Statistical Analysis MCQs With Answers

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Statistical Analysis Online Quiz

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• Test Name: Statistical Analysis MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Statistical Analysis

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1 / 40

What is a hypothesis in statistics?

A measure of variability

A measure of central tendency

A testable statement about a population parameter

2 / 40

What is factor analysis used for in statistics?

To calculate the median

To test correlation

To identify underlying factors or dimensions that explain patterns of correlations among variables

3 / 40

What is regression analysis used for in statistics?

To examine the relationship between variables

To summarize data

To describe data patterns

4 / 40

What is the Mann-Whitney U test used for in statistics?

To compare distributions of two groups when assumptions of the t-test are not met

To test correlation

To describe data patterns

5 / 40

What is a confidence level in statistics?

A measure of central tendency

A measure of variability

The probability that the interval estimate contains the population parameter

6 / 40

What is a confidence interval in statistics?

A range of values that is likely to contain the population parameter

A measure of variability

A measure of central tendency

7 / 40

What is the median in statistics?

The middle value in a sorted list of numbers

The range of values in a dataset

The average of a set of values

8 / 40

What is multivariate analysis used for in statistics?

Summarizing data

Analyzing relationships between multiple variables simultaneously

Visualizing data

9 / 40

What is a p-value in hypothesis testing?

A measure of variability

The probability of observing a test statistic as extreme as, or more extreme than, the one observed

A measure of central tendency

10 / 40

What is the central limit theorem in statistics?

States that the sample mean equals the population mean

States that the sampling distribution of the sample mean approaches a normal distribution

States that the population mean equals the sample mean

11 / 40

What is skewness in statistics?

A measure of the asymmetry of the probability distribution of a real-valued random variable

A measure of variability

A measure of central tendency

12 / 40

What does a small p-value indicate in hypothesis testing?

Strong evidence against the null hypothesis

Weak evidence against the null hypothesis

Strong evidence in favor of the null hypothesis

13 / 40

What is kurtosis in statistics?

A measure of central tendency

A measure of the "tailedness" of the probability distribution of a real-valued random variable

A measure of variability

14 / 40

What is a cumulative frequency distribution in statistics?

A measure of variability

A distribution that shows the number of observations less than or equal to a certain value

A measure of central tendency

15 / 40

What is a percentile in statistics?

A measure of central tendency

A measure indicating the value below which a given percentage of observations fall

A measure of variability

16 / 40

What is a t-test used for in statistics?

To test correlation

To visualize data distributions

To compare means of two groups

17 / 40

What is Type I error in hypothesis testing?

Accepting the null hypothesis when it is actually false

Rejecting the null hypothesis when it is actually true

A measure of central tendency

18 / 40

What is a box plot used for in statistics?

To describe data patterns

To visualize the distribution of numerical data and identify outliers

To calculate the median

19 / 40

What is a scatter plot used for in statistics?

To calculate the mean

To visualize the relationship between two numerical variables

To test correlation

20 / 40

What is a sample in statistics?

A measure of variability

A subset of the population used to draw conclusions

The entire population

21 / 40

What is the null hypothesis in statistics?

A measure of central tendency

A statement that there is no significant difference between specified populations

A statement that there is a significant difference between specified populations

22 / 40

What is ANOVA (Analysis of Variance) used for in statistics?

To compare means of more than two groups

To test correlation

To calculate the median

23 / 40

What does inferential statistics involve?

Drawing conclusions and making predictions from data

Describing data patterns

Cleaning data

24 / 40

What is standard deviation in statistics?

The average of a set of values

The most frequently occurring value

A measure of the amount of variation or dispersion in a set of values

25 / 40

What is a histogram used for in statistics?

To visualize the distribution of numerical data

To calculate the mean

To summarize data

26 / 40

What is Type II error in hypothesis testing?

A measure of variability

Rejecting the null hypothesis when it is actually true

Failing to reject the null hypothesis when it is actually false

27 / 40

What does variance measure in statistics?

The spread or dispersion of data points around the mean

The range of values in a dataset

The central tendency of data

28 / 40

What is the Wilcoxon rank-sum test used for in statistics?

To calculate the mean

To describe data patterns

To compare distributions of two groups when assumptions of the t-test are not met

29 / 40

What is the chi-square test used for in statistics?

To describe data patterns

To test the independence of categorical variables

To calculate the mean

30 / 40

What is descriptive statistics used for?

Summarizing and describing data

Predicting future outcomes

Creating new variables

31 / 40

What is correlation in statistics?

A measure of the strength and direction of the linear relationship between two variables

A measure of variability

A measure of central tendency

32 / 40

What is a CDF (Cumulative Distribution Function) used for in statistics?

To visualize data distributions

To calculate the median

To describe the probability distribution of a real-valued random variable

33 / 40

What is the alternative hypothesis in statistics?

A statement that there is a significant difference between specified populations

A measure of variability

A statement that there is no significant difference between specified populations

34 / 40

What is hypothesis testing in statistics?

A method for summarizing data

A method for cleaning data

A method for making inferences about a population based on sample data

35 / 40

What is the coefficient of determination (R-squared) in statistics?

A measure of variability

A measure of central tendency

A measure of how well the regression model fits the data

36 / 40

What is the mean in statistics?

The most frequently occurring value

The middle value in a dataset

The average of a set of values

37 / 40

What is a Q-Q plot used for in statistics?

To test correlation

To calculate the mean

To assess if a data set follows a particular distribution

38 / 40

What is the mode in statistics?

The average of a set of values

The middle value in a dataset

The value that appears most frequently in a dataset

39 / 40

What is the purpose of a correlation coefficient in statistics?

To measure the strength and direction of the linear relationship between two variables

To calculate the mean

To test for normality in data distributions

40 / 40

What is a population in statistics?

A measure of central tendency

A sample of data

The complete set of individuals, items, or data under study

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