Question

In: Statistics and Probability

Make your own research question for each A) z-test B) t-test C) independent samples D) related...

Make your own research question for each

A) z-test

B) t-test

C) independent samples

D) related samples

ANOVA

A) one-factor, independent measures

B) one-factor, repeated measures

Solutions

Expert Solution

z-tests when sample sizes are large (n is greater than
or equal to 30) whether or not you know the population standard deviation.

  • If you do not know the population standard deviation and have a small sample (n < 30), then you can use t-tests.
  • T-tests for independent samples uses two different sets of research subjects.
  • T-tests for dependent samples uses the same research subjects in two different conditions (like a "before" condition and an "after" condition) or when there are two samples that have been matched or "paired" in some way.

EXAMPLES-

z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or different from college students in general.

t test for independent samples: "Do 11th graders have significantly more unexcused absences than 10th graders in junior highs?

t test for dependent samples: " Do people drop weight after attending a weight loss boot camp for 2 months?

Research Question: for ANNOVA

Is there a statistically significant difference on dependent variable by independent variable?

caffeine dosage does make a difference to memory performance

orchestra answered 2 years ago
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