SBS T-test MCQ training

What is the main purpose of descriptive statistics?

• To test if a result is statistically significant

• To describe and summarize data

• To make predictions about future outcomes

• To find causal relationships in experiments

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

• Mean

• Median

• Mode

• Standard Deviation

What type of variable involves categories with no natural order?

• Continuous variable

• Ordinal variable

• Categorical variable

Why might researchers prefer using the median instead of the mean?

• Because the median is always higher

• Because it better handles heterogeneous data

• Because it includes more information

• Because it’s easier to calculate

What does the p-value represent in hypothesis testing?

• The chance the alternative hypothesis is true

• The probability of making a mistake

• The probability of observing the data, assuming the null hypothesis is true

• The probability the sample is incorrect

What is the main purpose of a one-sample t-test?

• To compare two different groups

• To compare two variables in the same group

• To test if a sample mean differs from a specific value

• To test the variability of a sample

What does Cohen’s d measure?

• The reliability of a survey

• The mean difference without variation

• The size of an effect relative to the data’s spread

• The number of errors in a test

Which test compares means between two separate groups, like men and women?

• One-sample t-test

• Paired-sample t-test

• Independent-sample t-test

What kind of variable places data in a specific order but without equal spacing?

• Continuous

• Categorical

• Ordinal

What happens if your p-value is smaller than your alpha level?

• You do not reject the null hypothesis and you do not support the alternative hypothesis

• You reject the null hypothesis and you support the alternative hypothesis