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A podiatrist recorded the recovery time, in days, for 38 patients. He was trying out a new procedure and hoped the result would be less recovery time on average. The mean recovery using the previous procedure was 6.5 days. The recorded times were:
8
7
6
9
4
5
3
10
2
12
Note that Σx = 229 and Σx2 = 1581.
(a) What is a point estimate for the population mean µ?
(b) Find a 90% confidence interval for µ.
(c) What is the maximum error of estimate for µ?
Any analysis required to check the required conditions (note that if you find that you cannot meet the required conditions for the test you expected to do, you must use the appropriate non-parametric test)
What is the probability she received 5 or more email during the same period?
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Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
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A Correlation matrix (correlation, coefficients and probability level under the hypothesis rho = 0) for a company's sales force (age, years of service, and current sales) is given below. Comment.
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A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car
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