Unit 10 and 11 Review Flashcardziz Review

Front

What is a P-value?

Back

A P-value indicates the probability that the null hypothesis is true given the observed results.

Front

What is the purpose of a two-sample t-test?

Back

A two-sample t-test is used to determine if there is a significant difference in the means of two independent groups.

Front

What are the null and alternative hypotheses for comparing two means?

Back

Front

What does it mean if a P-value is less than 0.05?

Back

It indicates that the observed event is unusual under the null hypothesis, leading to its rejection.

Front

What statistical test is appropriate for comparing the means of two independent groups?

Back

A two-sample t-test for a difference in means.

Front

What is the standard deviation in statistics?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

What is the significance level in hypothesis testing?

Back

The significance level (alpha) is the threshold for rejecting the null hypothesis, commonly set at 0.05.

Front

What is a one-sample t-test used for?

Back

A one-sample t-test is used to determine if the mean of a single sample is significantly different from a known value.

Front

What is the difference between a paired t-test and a two-sample t-test?

Back

A paired t-test compares means from the same group at different times, while a two-sample t-test compares means from two independent groups.

Front

What does it mean for data to be normally distributed?

Back

Data is normally distributed if it follows a bell-shaped curve, where most observations cluster around the mean.