Health insurers are beginning to offer telemedicine services online that replace
ID: 2616806 • Letter: H
Question
Health insurers are beginning to offer telemedicine services online that replace the common office visit. Wellpoint provides a video service that allows subscribers to connect with a physician online and receive prescribed treatments. Wellpoint claims that users of its LiveHealth Online service saved a significant amount of money on a typical visit. The data shown below ($), for a sample of 20 online doctor visits, are consistent with the savings per visit reported by Wellpoint.
Assuming the population is roughly symmetric, construct a 95% confidence interval for the mean savings for a televisit to the doctor as opposed to an office visit (to 2 decimals).
95% confidence interval: $ to $ per visit
93 33 40 107 82 55 55 48 40 76 49 96 94 74 71 79 95 99 53 80Explanation / Answer
Z value for a 95% confidence interval = 1.96 (using z table for normal distribution)
So confidence interval X = mean +/- Z * standard deviation = 69.47 +/- 1.96 * 22.77205 = 69.47 +/- 44.63
values taken from following table
Best of Luck. God Bless
No of doctor visits A Mean using AVERAGE function in excel = AVERAGE(A1:A20) Standard Deviation using excel function = STDEV.S(A1:A20) 1 93 69.47 22.77205 2 107 3 55 4 76 5 94 6 79 7 53 8 33 9 82 10 48 11 49 12 74 13 95 14 80 15 40 16 55 17 40 18 96 19 71 20 99Related Questions
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