ISON Session 3: Calculator
Question 43
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Line
Guide
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The beginning of a hiking trail is exactly at son level. There are three rost stops along the trail
• The elevation of the first rost stop is 10 foot
• The elevation of the second rost stop is -15 foot.
• The elevation of the third rost stop is 12 feet.
Jack compares the elevations, in foot of the first two rost stops by writing the inequality -10 <-15. Jack states that the inequality he wrote
Is correct boonuse 10 is less than 15.
Part A
Explain whether the inequality Jack writes is correct or incorrect. In your explanation, include a description of each value in the inequality in
terms of what it represents

(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?