using table 5

Confidence Intervals Practice PRACTICE PROBLEMS - do in your notes, answer completely.

1) I randomly select 25 students' Math SAT scores and find =600. I know that from this population is 50. Find a 95% Confidence Interval and interpret.

2) I randomly select 25 students' Math SAT scores and find =600. I know that from this population is 50. Find a 90% Confidence Interval and interpret.

3) I randomly select 25 students' Math SAT scores and find =600. I know that from this population is 50. Find a 99% Confidence Interval and interpret.

4) I randomly select 15students' Math SAT scores and find =600. I know that from this population is 50. Find a 99% Confidence Interval and interpret.

5) You sample 12 bugs and find the sample mean is 2.40 cm. You are told that =0.2 cm. Find a 95% Confidence Interval and interpret.

6) You sample 16 students in your school, and they average 13 hours of TV a week. Assume = 3. Find a 99% Confidence Interval and interpret.

7) You are testing chocolate chip cookies to estimate the mean number of chips per cookie. You sample 25 cookies and you find a sample mean of 10 chips per cookie. Assume = 2. Find a 95% confidence interval and interpret.

8) You are testing whether students at your school are overweight. You sample 25 students and measure how much more they weigh than the average weight for their height. The mean of your sample is 5 lbs, and we know that = 5. Find a 90% Confidence Interval and interpet.

PostedSun May 23, 2021 at 11:27 am