Mrs. Blair believes there is a relationship between the number of minutes students study and their test grades. she asked her history class to list the number of minutes they studied and their test grade. Using the information provided draw a scatterplot. What test grade might a student expect if they studied approximately 95 minutes? ___
X+Y

A) 60
B) 80
C) 100
D) 120

MINUTES STUDYING | TEST GRADE
20 65
22 65
25 50
25 52
30 55
30 68
45 70
45 69
60 75
75 80
90 78
90 83
90 85
100 88
100 78
110 95
120 96
120 100
150 91
150 85
160 82
180 80
180 80

(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?