Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the blood). For healthy adults, the mean of the x distribution is u = 7.4.t A new drug for arthritis has been developed. However, it is thought that this drug may change blood pH. A random sample of 41 patients with arthritis took the drug for 3 months. Blood tests showed that x = 8.6 with sample standard deviation s = 3.0. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH level of the blood.

Ronnie scored 8 baskets in his basketball game for a total of 18 points. How many two-point and three-point shots did he make? 2 two-point and 6 three-point shots 6 two-point and 2 three-point shots 6 three-point and 0 two-point shots There is not enough information

Albert has 15 CDs. Dianne has 2 more than 4 times as many CDs. How many CDs does dianne have?

Jessica baked 72 cookies and sold x cookies. Max baked 36 cookies and sold half as many cookies as Jessica did. How many cookies did Jessica sell if they each had the same number of cookies left over? A. 18 B. 36 C. 24 D. 72