Following are weights in pounds for random samples of20 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 and2 denote the mean weight of girls. Can you conclude that the mean weights differ between boys and girls? Use the = 0.05 level and theP-value method with the table.

Boys:

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 8.6 7.7 7.4 7.7

8.1 6.4

Girls:

7.4 6.0 6.7 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

1. State the appropriate null and alternate hypotheses.
2. Is this a right-tailed, left-tailed, or two-tailed test?
3. Compute the test statistic. Do not round the intermediate steps. Round the answer to two decimal places.
4. Compute the P-value. Use the answer from the last question. Round the answer to four decimal points.
5. Determine whether to reject H0.
6. State a conclusion.