Following are weights in pounds for random samples of18 newborn baby boys and baby girls born in Denver in2011.Boxplots indicate that the samples come from populations that are approximately normal. Let1 denote the mean weight of boys and2denote the mean weight of girls. Can you conclude that the mean weight of boys is greater than the mean weight of girls? Use the = 0.01level and theP-value method with the table.

Boys:

5.9 6.4 7.6 6.4 8.1 7.9 8.3 7.3 6.4

8.4 8.5 6.9 6.3 7.4 7.8 7.5 6.9 7.8

Girls:

8.2 7.5 5.7 6.6 6.4 8.5 7.2 6.9 8.2

6.5 6.7 7.2 6.3 5.9 8.1 8.2 6.7 6.2

1. State the appropriate null and alternate hypotheses.
2. Determine what kind of hypothesis test this is. (Right-tailed, left-tailed, or two-tailed).
3. Compute the test statistic. Round the answer to three decimal places.
4. How many degrees of freedom are there, using the simple method?
5. Estimate theP-value. Fill in the correct blank. P (blank), P > (blank), (blank) < P (blank).
6. Determine whether to rejectH0.
7. State a conclusion.