Assume that the weights of chinook salmon in the columbia river are normally distributed. you randomly catch and weigh 40 such salmon. the mean weight from your sample is 23.6 pounds with a standard deviation of 3.5 pounds. test the claim that the mean weight of columbia river salmon is greater than 23 pounds. test this claim at the 0.10 significance level.
(a) what type of test is this? i) this is a right-tailed test. ii) this is a two-tailed test. iii) this is a left-tailed test.(b) what is the test statistic? round your answer to 2 decimal places.

In the geometric progression –3, 12, −48… what term is 3,072?

Aconcession manager at yankee stadium wants to know how temperature affects beer sales. she took a sample of 10 games and recorded the number of beers sold and the temperature in the middle of the game. temperature 80 68 78 79 87 74 86 92 77 84 number of beers 20533 1439 13829 21286 30985 17187 30240 87596 9610 28742 a. draw a scatter plot of the data. b. the manager estimates the regression equation to be: numberofbeers = −100, 678 + 1, 513 ∗ temperature draw this on your scatter plot. c. for one of the estimated points, indicate the residual with ei . d. for that same point, indicate what part of the variation is explained by the model with ˆyi − y¯.

30 points if you answer all 3 questions with work!