The effect of exercise on the amount of lactic acid in the blood was examined in eight men during a weeklong training camp. Blood lactate levels were measured before and after the training. Document...

Probability and Statistics Homework #10 1. Twelve measurements each of the hydrogen content (in percent number of atoms) of gases collected from the eruptions of two volcano’s yielded , Use the level of significance of 0.01 to test the null hypothesis that there is no difference (with regard to the hydrogen content) in the composition of the gases from the two eruptions. (10 points) 2. The effect of exercise on the amount of lactic acid in the blood was examined in eight men during a weeklong training camp. Blood lactate levels were measured before and after the training. Use a 0.01 level of significance to determine if the training reduced the lactic acid build-up in the blood during exercise. (10 points) 3. In group of 355 randomly selected high school females, 103 elected to take mathematics asan elective their senior year. In a group of 501 randomly selected high school males, 172 decided to take mathematics as an elective in their senior year. Is there evidence to suggest more males take math as an elective? Test at the 10% significance level. (10 points) 4. The table below gives the pretest and posttest scores on the Modern Language Associations listening test in Spanish for 6 high school Spanish teachers who attended an intensive summer course in Spanish Use a 0.05 level of significance to determine if the summer course improves the performance of the teachers on the Modern Language Associations listening test in Spanish. (10 points) 5. In a study of 905 randomly selected children aged 15-17, 198 say they watch 3 or morehours of television per day. In a study of 503 randomly selected children aged 12-14, 89 reported they watch 3 or more hours of television per day. Is there a significant...