Two-sample t-test for independent samples

Consider the PHYSHLTH column from the Boston and Seattle dataset from the

CDC BRFSS data. Refer to your two-sample tests for independent samples

PowerPoint in Canvas.

1.) What would the null and alternative hypothesis be when comparing the

PHYSHLTH data from Boston to Seattle?

2.) What are two-sample t-tests used for?

3.) When can we use a two-sample t-test for independent samples? What are the

assumptions?

4.) Explain why a two-sample t-test would be used instead of a two-sample z-test.

5.) Using the PHYSHLTH column, determine if the samples have equal or unequal

variances.