1) A study was conducted to investigate the relationship between soda consumptions (servings per day) and weight gain (kgs) over a 2 year period and yielded the following linear regression results:

weight gainover a 2 year period (kgs) = 3.5 + 0.2(servings of soda per day)

What is the predicted weight gain over a 2 year period for someone that drinks 3 servings of soda per day?

Select one:

a.

5.5 kgs

b.

6 kgs

c.

4.1 kgs

2) A group of inexperienced weightlifters was randomized to either perform Crossfit or Olympic lifting workouts for 10 weeks. Researchers then determined whether or not each participant increased their one repetition maximum (1RM) by at least 15%. What statistical test should be used to determine if the proportion of participants that increased their 1RM by at least 15% is higher in those performing Crossfit or Olympic lifting?

Select one:

a.

One sample test of proportions

b.

Two-sample test of proportions

c.

Chi-square goodness of fit test

d.

Paired t-test