Statistics MCQs

Statistics MCQs

Answer these 30 Statistics MCQs and see how sharp is your knowledge of Statistics.
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1: The t distribution approaches the _______________ distribution as the sample size ___________.

A.   Binomial, increases

B.   Binomial, decreases

C.   Z, increases

D.   Z, decreases

2: As the degrees of freedom increase, the t distribution approaches the _____ distribution.

A.   P = .50

B.   Decreases

C.   Confidence level

D.   Normal

3: A probability distribution for all possible values of a sample statistic is known as a _____.

A.   A sample statistic

B.   A parameter

C.   Simple random sampling

D.   A sampling distribution

E.   None of the above

4: A ____________ variable can have values that are numbers on the real number line.

A.   Qualitative

B.   Quantitative

C.   Random

D.   Nominative

5: A contingency table would be used to summarize data such as ________.

A.   Company employees by gender and organizational title

B.   Company employees by gender and age

C.   Company employees by compensation and age

D.   Company employees by compensation and years with the company

6: Both qualitative and quantitative data can be displayed using a _____ graph.

A.   Circle

B.   Line

C.   Bar

D.   Pie

7: The ___ can be used to show the rank order and shape of a data set simultaneously.

A.   Ogive

B.   Pie chart

C.   Stem-and-leaf display

D.   Bar chart

8: In a scatterplot, a(n) ______________ is a point lying far away from the other data points.

A.   Outliner

B.   Y-intercept

C.   Slope

D.   Influential point

9: Sample size and the confidence level width have a (n) __________ relationship.

A.   Symbiotic

B.   Inverse

C.   Synonymous

D.   Identical

10: If calculated required sample size is a non integer value, we should always _____ calculated value.

A.   Round up

B.   Eliminate 1

C.   Divide by 0

D.   None of these

11: Data displays are __________ patterns in data.

A.   Coded examples of

B.   Numerical references to

C.   Visual images of

D.   Dull-down menus that access

12: By selecting a larger alpha level, a researcher is ______.

A.   Attempting to make it easier to reject H0

B.   Better able to detect a treatment effect

C.   Increasing the risk of a Type I error

D.   All of the above

13: The area under the normal curve to the right of μ equals _______.

A.   1

B.   1/2

14: The complement of an event a, within the sample space s, is the event consisting of ____________.

A.   All outcomes in S that are not in A

B.   All outcomes in A that are not in S

C.   Some outcomes in S that are not in A

D.   Some outcomes in A that are not in S

15: The first and second steps in constructing a frequency distribution are __________.

A.   Calculate the range of the data set ; Divide the range by the number of groups you want and then round up

B.   Alternative hypothesis; Calculate the range of the data set

C.   Null hypothesis; Alternative hypothesis

D.   Direct hypothesis; Null hypothesis

16: The five number summary can be calculated ___________.

A.   For a quantitative variable, but not for a categorical variable

B.   Calculate the range of the data set ; Divide the range by the number of groups you want and then round up

C.   Alternative hypothesis; Calculate the range of the data set

D.   Null hypothesis; Alternative hypothesis

17: The heights of the bars of a histogram correspond to _______ values.

A.   Frequency

B.   Alternative hypothesis

C.   Null hypothesis

D.   Direct hypothesis

18: The hypothesis statement h: μ < 60 is an example of a(an) ________ hypothesis.

A.   Alternative hypothesis

B.   Null hypothesis

C.   Direct hypothesis

D.   All of these

19: The maximum height of a normal curve corresponds to the ________ of a normal distribution.

A.   Range

B.   Mean

C.   Standard deviation

D.   Statistical significance

20: The mean of a collection of data is located at the ______ of a distribution of data.

A.   Balancing point

B.   Standard deviation

C.   Statistical significance

21: The sum of the differences between sample observations and the sample mean is equal to _______.

A.   Zero

B.   The mean deviation

C.   The range

D.   The standard deviation

22: To locate the percentile for a given observation in a data set, the data must be ___________.

A.   Displayed in a histogram

B.   Sorted and listed from the minimum to the maximum values

C.   Distributed symmetrically around the mean

D.   Summarized in a frequency distribution

23: Two samples are ________________ if the sample values are paired.

A.   Dependant

B.   Independant

C.   Both

24: In a curvilinear regression model, the ________ represents the curvilinear effect.

A.   Intercept

B.   Error term

C.   Slope

D.   R Square

25: A(n) _______ distribution has a ""bell"" shape.

A.   Normal.

B.   Outlier.

C.   Relative frequency.

D.   Polygon.

26: If the shape of the distribution of a set of data is positively skewed, its skewness is ________.

A.   Longer on the right side.

B.   Shorter on the right side.

C.   Longer on the left side.

D.   Shorter on the right side.

27: _______ is choosing how many to order or make each time an order is planned.

A.   Quantity determination

B.   Package sizing

C.   Lot sizing

D.   Grouping

E.   Aggregation

28: The empirical rule applies to distributions that are ________.

A.   Symmetric and unimodal

B.   Regression equation

C.   The mean tends to be greater than the median

D.   40% response is explained on the regression line

29: Probability of an outcome in a decision-making situation with uncertainty is __________.

A.   The likelihood of the outcome.

B.   Relative frequency of the occurrence.

C.   10.

D.   Sample space.

30: Raw, unorganized facts that need to be processed are called ________.

A.   Samples

B.   Information

C.   Insights

D.   Research

E.   Data

31: A histogram is a type of frequency __________.

A.   Data

B.   Box

C.   Distribution

D.   Line