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Ответы на тесты Theory of Probability and Mathematical Statistics.d

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Бесплатные ответы на тесты по предмету «Theory of Probability and Mathematical Statistics.d» — Синергия и МТИ

Вопрос 1Ответ открыт бесплатно

Which of the following values is used as a summary measure for a sample, such as a sample mean?

  1. Population parameter
  2. Sample parameter
  3. Sample statistic✓ Правильный ответ
  4. Population mean
✓ Правильный ответ

Sample statistic

Вопрос 2

Which of the following is a branch of predictive statistics?

  1. Descriptive statistics
  2. Inferential statistics
  3. Industry statistics
  4. Business statistics
Вопрос 3

The control charts and procedures of descriptive statistics which are used to enhance a procedure can be classified into which of these categories?

  1. Behavioural tools
  2. Serial tools
  3. Industry statistics
  4. Statistical tools
Вопрос 4

Which of the following can also be represented as sample statistics?

  1. Lowercase Greek letters
  2. Roman letters
  3. Associated Roman alphabets
  4. Uppercase Greek letters
Вопрос 5

To which of the following options do individual respondents, focus groups, and panels of respondents belong?

  1. Primary data sources
  2. Secondary data sources
  3. Itemised data sources
  4. Pointed data sources
Вопрос 6Ответ открыт бесплатно

What are the variables whose calculation is done according to the weight, height, and length known as?

  1. Flowchart variables
  2. Discrete variables
  3. Continuous variables✓ Правильный ответ
  4. Measuring variables
✓ Правильный ответ

Continuous variables

Вопрос 7

Which method used to examine inflation rate anticipation, unemployment rate, and capacity utilisation to produce products?

  1. Data exporting technique
  2. Data importing technique
  3. Forecasting technique
  4. Data supplying technique
Вопрос 8

Specialised processes such as graphical and numerical methods are utilised in which of the following?

  1. Education statistics
  2. Descriptive statistics
  3. Business statistics
  4. Social statistics
Вопрос 9

What is the scale applied in statistics, which imparts a difference of magnitude and proportions, is considered as?

  1. Exponential scale
  2. Goodness scale
  3. Ratio scale
  4. Satisfactory scale
Вопрос 10Ответ открыт бесплатно

Review of performance appraisal, labour turnover rates, planning of incentives, and training programs are the examples of which of the following?

  1. Statistics in production
  2. Statistics in marketing
  3. Statistics in finance
  4. Statistics in personnel management✓ Правильный ответ
✓ Правильный ответ

Statistics in personnel management

Вопрос 11

A graphical method of representing the sample points of a multiple-step experiment is …

  1. A frequency polygon
  2. A histogram
  3. An ogive
  4. A tree diagram
Вопрос 12

If the frequency curve has a longer tail to left, the distribution is …

  1. Negatively skewed
  2. Positively skewed
  3. Symmetrical
  4. Not skewed
Вопрос 13Ответ открыт бесплатно

Decumulative frequency is presented by …

  1. More than ogive
  2. Less than ogive✓ Правильный ответ
  3. Equal to ogive
  4. Not ogive
✓ Правильный ответ

Less than ogive

Вопрос 14

Which of the following is an example of compressed data: …

  1. Histogram
  2. Ungrouped data
  3. Frequency distribution
  4. Tabulation
Вопрос 15

A circle in which sectors represents various quantities is called …

  1. Histogram
  2. Frequency Polygon
  3. Pie chart
  4. Component bar chart
Вопрос 16Ответ открыт бесплатно

The frequency polygon is a closed diagram of …

  1. Two-sides
  2. Three sides
  3. Unlimited sides✓ Правильный ответ
  4. Four sides
✓ Правильный ответ

Unlimited sides

Вопрос 17

Frequency curve is …

  1. Asymptotic to y-axis
  2. Non-asymptotic to y-axis
  3. Asymptotic to x-axis
  4. Non-asymptotic to x-axis
Вопрос 18

A histogram is …

  1. A frequency graph
  2. A time-series plot
  3. A graph-plotting mean against standard deviation
  4. A correlative frequency chart
Вопрос 19

Component bar charts are used when data is divided into: …

  1. Parts
  2. Groups
  3. Circles
  4. Squares
Вопрос 20Ответ открыт бесплатно

A Histogram containing a set of …

  1. Adjacent Rectangles✓ Правильный ответ
  2. Non-Adjacent rectangles
  3. Adjacent squares
  4. Adjacent triangles
✓ Правильный ответ

Adjacent Rectangles

Вопрос 21

Which of the following is appropriate to graph a single categorical variable?

  1. Histogram
  2. Bar chart
  3. Boxplot
  4. Scatterplot
Вопрос 22

Which of the following is appropriate to graph a single continuous variable?

  1. Waffle chart
  2. Histogram
  3. Bar chart
  4. Pie chart
Вопрос 23Ответ открыт бесплатно

A mosaic plot is used when graphing …

  1. the relationship between two continuous variables
  2. the relationship between one continuous and one categorical variable
  3. the relationship between two categorical variables✓ Правильный ответ
  4. data that are not normally distributed by group
✓ Правильный ответ

the relationship between two categorical variables

Вопрос 24

Which of the following is not a recommended type of graph?

  1. Pie chart
  2. Bar chart
  3. Waffle chart
  4. Density plot
Вопрос 25

Density plots, histograms, and boxplots can all be used to …

  1. examine frequencies in categories of a factor
  2. examine the relationship between two categorical variables
  3. determine whether two continuous variables are related
  4. examine the distribution of a continuous variable
Вопрос 26Ответ открыт бесплатно

The graph which shows the changes over a specific time period is called …

  1. meridian graph
  2. pie graph
  3. line graph✓ Правильный ответ
  4. bar graph
✓ Правильный ответ

line graph

Вопрос 27

The vertical axis of bar graph is also known as …

  1. y-axis
  2. h-axis
  3. v-axis
  4. x-axis
Вопрос 28

Considering the line graph, the x-axis represents …

  1. false energy units
  2. infrared energy units
  3. subject of measurement
  4. time period
Вопрос 29

Considering the line graph, the y-axis represents …

  1. time period in years
  2. subject of measurement
  3. time period in days
  4. time period in minutes
Вопрос 30Ответ открыт бесплатно

The horizontal axis of bar graph is also known as …

  1. v-axis
  2. x-axis✓ Правильный ответ
  3. y-axis
  4. h-axis
✓ Правильный ответ

x-axis

Вопрос 31

Which measure of central tendency takes into account the magnitude of scores?

  1. Median
  2. Range
  3. Mode
  4. Mean
Вопрос 32

The median of an ordered set of data is the value that represents …

  1. The mean of the squared deviations of the values from the mean
  2. The most frequently observed value
  3. The arithmetic average of the data values
  4. The middle or approximate middle of the data set
Вопрос 33Ответ открыт бесплатно

A measure of central tendency, given as the value above which half of the values fall and below which half of the values fall is called the ...

  1. Maxima
  2. Mode
  3. Median✓ Правильный ответ
  4. Mean
✓ Правильный ответ

Median

Вопрос 34

What is the median of the following set of scores? 19, 5, 12, 10, 14?

  1. 10
  2. 14
  3. 19
  4. 12
Вопрос 35

The mean of ten numbers is 58. If one of the numbers is 40, what is the mean of the other nine?

  1. 540
  2. 60
  3. 18
  4. 162
Вопрос 36Ответ открыт бесплатно

On his first 5 biology tests, Bob received the following scores: 72, 86, 92, 63, and 77. What test score must Bob earn on his sixth test so that his average (mean score) for all six tests will be 80

  1. 90✓ Правильный ответ
  2. 86
  3. 95
  4. 80
✓ Правильный ответ

90

Вопрос 37

Following are the disadvantages of Mean except …

  1. Does not possess the desired algebraic property
  2. Cannot be computed if there are missing values due to omission or non-response
  3. Easily affected by extreme values
  4. In grouped data with open-ended class intervals, the mean cannot be computed
Вопрос 38

Which of the following is NOT a common measure of central tendency?

  1. Mean
  2. Mode
  3. Median
  4. Range
Вопрос 39

There are two methods of finding mode in discrete series …

  1. Mid point method and table method
  2. Descending method and grouping method
  3. Inspection method and grouping method
  4. Ascending method and grouping method
Вопрос 40Ответ открыт бесплатно

Following are the partition values except …

  1. Deciles
  2. Quartile
  3. Mode✓ Правильный ответ
  4. Percentile
✓ Правильный ответ

Mode

Вопрос 41

The techniques which provide the decision maker a systematic and powerful means of analysis to explore policies for achieving predetermined goals are called …

  1. Correlation techniques
  2. Mathematical techniques
  3. Quantitative techniques
  4. Multiplication techniques
Вопрос 42

Correlation analysis is not a ...

  1. Univariate analysis
  2. Bivariate analysis
  3. Unidimensional analysis
  4. Multidimensional analysis
Вопрос 43Ответ открыт бесплатно

If change in one variable results a corresponding change in the other variable, then the variables are ...

  1. Correlated✓ Правильный ответ
  2. Uni corelated
  3. Regression
  4. Bi correlated
✓ Правильный ответ

Correlated

Вопрос 44

When the values of two variables move in the same direction, correlation is said to be ...

  1. Linear
  2. Non-linear
  3. Positive
  4. Negative
Вопрос 45

When the values of two variables move in the opposite directions, correlation is said to be …

  1. Linear
  2. Non-linear
  3. Positive
  4. Negative
Вопрос 46Ответ открыт бесплатно

When the amount of change in one variable leads to a constant ratio of change in the other variable, then correlation is said to be …

  1. Linear✓ Правильный ответ
  2. Non-linear
  3. Positive
  4. Negative
✓ Правильный ответ

Linear

Вопрос 47

... attempts to determine the degree of relationship between variables.

  1. Regression analysis
  2. Correlation analysis
  3. Inferential analysis
  4. Statistics
Вопрос 48

Non-linear correlation is also called ...

  1. Non-curvy linear correlation
  2. Curvy linear correlation
  3. Zero correlation
  4. Asymptotic
Вопрос 49

Scatter diagram is also called …

  1. Dot chart
  2. Correlation graph
  3. Histogram
  4. Bar Graph
Вопрос 50Ответ открыт бесплатно

If all the points of a scatter diagram lie on a straight line falling from left upper corner to the right bottom corner, the correlation is called ...

  1. Zero correlation
  2. High degree of positive correlation
  3. Perfect negative correlation✓ Правильный ответ
  4. Perfect positive correlation
✓ Правильный ответ

Perfect negative correlation

Вопрос 51

If you rolled a 6-sided dice, what is the probability of rolling a 3?

  1. 1/6
  2. 2/3
  3. 3/6
  4. 5/6
Вопрос 52

If you flipped 2 coins, what is the probability that both will land on tails?

  1. 2/4
  2. 3/4
  3. 1/4
  4. 0/4
Вопрос 53Ответ открыт бесплатно

If you rolled a 6-sided dice, what is the probability of rolling a even number?

  1. 2/6
  2. 3/6✓ Правильный ответ
  3. 4/6
  4. 5/6
✓ Правильный ответ

3/6

Вопрос 54

A lolly bag contains 2 red, 3 green and 2 blue gum balls. What is the probability of selecting a green one?

  1. 2/7
  2. 5/7
  3. 4/7
  4. 3/7
Вопрос 55

A card is selected from a deck of playing cards. What is the probability of selecting a red card?

  1. ¼
  2. 3/4
  3. 0/2
  4. ½
Вопрос 56Ответ открыт бесплатно

What is the probability of selecting the diamond suit from a deck of playing cards?

  1. 1/4✓ Правильный ответ
  2. 2/4
  3. 3/4
  4. 0/4
✓ Правильный ответ

1/4

Вопрос 57

What is the probability of rock beating paper?

  1. 0/3
  2. 1/3
  3. 2/3
  4. 1
Вопрос 58

If you flipped a coin, what is the probability it will land on heads?

  1. 0/2
  2. 1/4
  3. 3/4
  4. ½
Вопрос 59

There are red, yellow and green lollipops in a bag. What is the probability of selecting a blue one?

  1. 1/4
  2. 1
  3. 0/3
  4. 2/3
Вопрос 60Ответ открыт бесплатно

What is the probability of paper losing to scissors?

  1. 0/3
  2. 1/3
  3. 2/3
  4. 1✓ Правильный ответ
✓ Правильный ответ

1

Вопрос 61

Data originally collected in the process of investigation are known as …

  1. Foreign data
  2. Primary data
  3. Third data
  4. Secondary data
Вопрос 62

Census is …

  1. The method of planning, organising and publishing data
  2. The method in which no data is collected
  3. The method In which data is collected from each and every unit
  4. The method in which few units out of the entire population are chosen
Вопрос 63Ответ открыт бесплатно

Statistical enquiry means …

  1. It is science for knowledge
  2. Search for knowledge
  3. Collection of anything
  4. Search for knowledge with the help of statistical methods✓ Правильный ответ
✓ Правильный ответ

Search for knowledge with the help of statistical methods

Вопрос 64

… are those which are already in existence and which might be collected for some purpose other than the answering of the question in hand.

  1. Direct data
  2. Basic data
  3. Primary data
  4. Secondary data
Вопрос 65

Which law is also called Principle of Stability of Mass Data …

  1. Gravitational law
  2. Law of statistical regularity
  3. Law of demand
  4. Law of Inertia of large numbers
Вопрос 66Ответ открыт бесплатно

Following are the method of restricted random sampling except …

  1. Table of random numbers
  2. Stratified sampling
  3. Purposive sampling✓ Правильный ответ
  4. Cluster sampling
✓ Правильный ответ

Purposive sampling

Вопрос 67

An enquiry in which each unit of the universe is studied is called ...

  1. Sample
  2. Population
  3. Incomplete enumeration
  4. Complete enumeration
Вопрос 68

Cluster sampling means …

  1. Sample is divided into number of sub-groups
  2. Sample are selected at regular interval
  3. Sample is obtained by conscious selection
  4. Universe is divided into groups
Вопрос 69

How sample method is differ from census method on the basis of cost?

  1. Sample method enssures the correctness of the data
  2. Census is less time consuming
  3. It is less expensive
  4. It is suitable when universe comprises of homogeneous nature
Вопрос 70Ответ открыт бесплатно

In … information is recorded by the informants themselves whereas in … information as supplied by the informants is recorded by the enumerators.

  1. Questionnaire and direct investigation
  2. schedule and Questionnaire
  3. Question and scale
  4. Questionnaire and schedule✓ Правильный ответ
✓ Правильный ответ

Questionnaire and schedule

Вопрос 71

Which of the following are not the assumptions underlying the use of parametric tests (based on the normal distribution)?

  1. Mean is always bigger than median
  2. Some feature of the data should be normally distributed
  3. The samples being tested should have approximately equal variances
  4. The data should be at least interval level
Вопрос 72

Which of the following is the least affected by outliers?

  1. The range
  2. The mean
  3. The median
  4. The standard deviation
Вопрос 73Ответ открыт бесплатно

Which of the following is not a transformation that can be used to correct skewed data?

  1. Log transformation
  2. Square root transformation
  3. Reciprocal transformation
  4. Tangent transformation✓ Правильный ответ
✓ Правильный ответ

Tangent transformation

Вопрос 74

If we were to pull all possible samples from a population, calculate the mean for every sample, and construct a graph of the shape of the distribution based on all of the means, what would we have?

  1. The population distribution of the mean
  2. The sampling distribution of the mean
  3. The bootstrap distribution of the mean
  4. The standard error of the mean
Вопрос 75

Approximately what percentage of people would have scores lower than an individual with a z-score of 1.65 in a normally distributed sample?

  1. 95%
  2. 98%
  3. It is not possible to calculate this unless the mean and standard deviation are given
  4. 1%
Вопрос 76Ответ открыт бесплатно

The binomial distribution depends on which of the following?

  1. Mean and standard deviation
  2. Sample size and probability of success✓ Правильный ответ
  3. Standard deviation and number of successes
  4. Mean and probability of success
✓ Правильный ответ

Sample size and probability of success

Вопрос 77

The normal distribution depends on which of the following?

  1. Mean and standard deviation
  2. Sample size and probability of success
  3. Standard deviation and number of successes
  4. Mean and probability of success
Вопрос 78

In a normal distribution, 95% of observations are …

  1. within one standard deviation of the mean
  2. included in computing the mean
  3. within two standard deviations of the mean
  4. divided by the sample size to get the standard deviation
Вопрос 79

A sampling distribution shows …

  1. the distribution of means from multiple samples
  2. the distribution of sample sizes over time
  3. the distribution of scores in the population
  4. the distribution of observations from a single sample
Вопрос 80Ответ открыт бесплатно

The z-score is …

  1. the number of standard errors between the mean and some observation
  2. the difference between the sample mean and population mean
  3. the width of the 95% confidence interval
  4. the number of standard deviations an observation is from the mean✓ Правильный ответ
✓ Правильный ответ

the number of standard deviations an observation is from the mean

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