Aclassroom study was done to investigate the relationship between time and answering test questions. the correlating linear model is shown below, where x represents the number of questions answered, and y represents the number of minutes of test taking. interpret the slope.
y = 0.87x
a. an additional 0.87 test questions answered is associated with an additional minute of test taking.
b. an additional 0.87 minutes of test taking is associated with an additional test question answered.
c. zero minutes of test taking is associated with 0.87 test questions answered.
d. not enough information is provided to interpret the slope.

(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?