The fitness instructor is concerned with pretest to posttest differences in percent body fat for subjects involved in water aerobics training class. the correct statistic the teacher should use to examine this mean difference isa. ttest for independent groupsb. ttest for dependent groupsc. chi-squared. one-way

T-test for dependent groups

Explanation:

This is because this type of test compares the means of two related groups to see if there is a statistically significant difference between these means.

A T-test for dependent groups is an example of a "within-subjects" or "repeated-measures" test. This means that the same participants are tested more than one time. "Related groups" indicates that the same participants are present in both groups.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

yes

it is because 3 because the citizen the northern democratic party watned the warning on red to blue because it is purple. lol