How much more time do statistics students spend studying for their final exam than they spend studying for their midterm exam? A researcher randomly selected ten statistics students and asked how many minutes they spent studying for each exam. The results of the study are shown below.

Final	306	267	333	174	211	212	156	166	247	220
Midterm	217	232	175	45	149	37	190	211	28	176

Assume both follow a Normal distribution.

For this study, we should use

Select an answer

- t-interval for the difference between two dependent population means

-t-interval for the difference between two independent population means

- z-interval for a population proportion t-interval for a population mean

-z-interval for the difference between two population proportions

Compute the 95% confidence interval for the difference. Round to the nearest minute.

(______ , _______)

Interpret the confidence interval in the context of the study:

• With 95% confidence the mean number of minutes that the ten sampled statistics students spent studying for their final exam is between $21 and $146 more than the mean number of minutes that the ten sampled statistics students spent studying for their final exam.
• With 95% confidence the population mean number of minutes statistics students spend studying for their final exam is between $21 and $146 more than the population mean number of minutes statistics students spend studying for their midterm exam.