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Togus Bash
STATISTICS
-
Inferential Statistics
What is the purpose of a regression coefficient?
A. To indicate the strength and direction of a relationship.
B. To summarize data.
C. To test hypotheses.
D. To calculate means.
Togus Bash
STATISTICS
-
Inferential Statistics
Which of the following is an assumption of linear regression?
A. Homoscedasticity.
B. Multicollinearity.
C. Independence of errors.
D. All of the above.
Togus Bash
STATISTICS
-
Inferential Statistics
What does a 95% confidence interval mean?
A. 95% of the sample data falls within the interval.
B. We are 95% confident the population parameter is within the interval.
C. The interval will contain the parameter 95% of the time.
D. 95% chance of making a Type I error.
Togus Bash
STATISTICS
-
Inferential Statistics
What is the main purpose of bootstrapping in statistics?
A. To estimate the sampling distribution.
B. To increase sample size.
C. To reduce bias.
D. To visualize data.
Togus Bash
STATISTICS
-
Inferential Statistics
In a two-sample t-test, what assumption is made about the variances?
A. They are equal.
B. They are unequal.
C. They are both zero.
D. They are both one.
Togus Bash
STATISTICS
-
Inferential Statistics
What does a confidence interval of (10, 20) imply?
A. The population mean is exactly 15.
B. The population mean is between 10 and 20.
C. The sample mean is between 10 and 20.
D. The population mean is less than 10.
Togus Bash
STATISTICS
-
Inferential Statistics
What is the purpose of a sample in inferential statistics?
A. To represent the entire population.
B. To summarize data.
C. To test hypotheses.
D. To collect data.
Togus Bash
STATISTICS
-
Inferential Statistics
Which of the following tests is used for paired samples?
A. Independent t-test.
B. Paired t-test.
C. ANOVA.
D. Chi-square test.
Togus Bash
STATISTICS
-
Inferential Statistics
What does the term "effect size" refer to?
A. The magnitude of a relationship.
B. The direction of a relationship.
C. The sample size.
D. The significance level.
Togus Bash
STATISTICS
-
Inferential Statistics
What is the main goal of a regression analysis?
A. To predict outcomes.
B. To summarize data.
C. To visualize data.
D. To test hypotheses.
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STATISTICS
Inferential Statistics
Time Series Analysis
Probability Distributions
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