Hannah is having her bedroom painted. Interior Designs of Royal Palm
Beach charges $60 for inspection and $40 per hour for painting.
Wellington's Splash of Color charges $70 per hour for painting, but no
inspection fee. Which of the following are true? Select all that apply. *

If it takes 7 hours to paint Hannah's room, Interior Design will be cheaper.

If it takes 3 hours to paint the room, both companies will charge the same amount.

If it takes 10 hours to paint Hannah's room, Splash of Color will cost at least $200
more than Interior Design.

Splash of Color will always be cheaper.

(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?