The average price of a college math textbook is $162 and the standard deviation is $25. Suppose that 11 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. Find the third quartile for the average textbook price for

The average price of a college math textbook is $153 and the standard deviation is $29. Suppose that 8 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of ? I - N( b. For the group of 8, find the probability that the average price is between $138 and $147. c. Find the first quartile for the average textbook price for this sample size. $ (round to the nearest cent) d. For part b), is the assumption that the distribution is normal necessary? O YesO No Hint: Some Helpful Videos:

Is the proportion of wildfires caused by humans in the south different from the proportion of wildfires caused by humans in the west? 350 of the 519 randomly selected wildfires looked at in the south were caused by humans while 383 of the 500 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the a = 0.01 level of significance? Rectangular Snip a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer | (please enter a decimal) Select an answer v Select an answer H1: Select an answer v Select an answer vSelect an answer v (Please enter a decimal) c. The test statistic ? v = (please show your answer to 3 decimal places.)

Find the sample standard deviation. Round to the nearest tenth as needed. 9, 5, 16, 5, 15, 10, 9, 17, 19 A. 5.2 B. 27.3 OC. 24.2 D. 4.9