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In New York State, savings banks are permitted to sell a form of life insurance called savings bank life insurance (SBLI). The approval process consists of underwriting, which includes a review of the application, a medical information bureau check, possible requests for additional medical information and medical exams, and a policy compilation stage in which the policy pages are generated and sent to the bank for delivery. The ability to deliver approved polices to customers in a timely manner is critical to the profitability of this services. During a period of one month, a random sample of 27 approved polices is selected, and the total processing time, in days, is recorded (and stored in Insurance):
73
19
16
64
28
31
90
60
56
22
18
45
48
17
91
92
63
50
51
69
a. In the past, the mean processing time was 45 days. At the 0.05 level of significance, is there evidence that he mean processing tiem has changed from 45 days?
b. What assumption about the population distribution is needed in order to conduct the t test in (a).
c. Construct a boxplot or a normal probability plot to evaluate the assumption made in (b).
d. Do you think that the assumption needed in order to conduct the t test in (a) is valid? Explain.
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The slope of tangent line
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A car traveling at 60 mph is brought to a stop, at constant deceleration, 88 feet from where the brakes are applied. How lond did it take for the car to stop?
new age pharmaceuticals produces the drug nasamist from four chemicals. today the company must produce 1000 pounds of
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Sharon needs 64 credits to graduate fro her community college. So far she has earned 24 credits. What percent of the required credits does she have?
Three students are doing an assignment.John has finished 4/5 of the assignment,Sarah has finished 3/4 and Jo has finished 2/3. Which student has done the most?
Find the curve that passes through the points (3, 2) and has the property that if the tangent line is drawn at any point P on the curve, then the part of the tangent line that lies in the first quadrant is bisected at P.
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