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Jolynn - Week 5 Individual Assignment

Jolynn - Week 5 Individual Assignment - Jolynn Weeks Week 5...

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Jolynn Weeks - Week 5 Individual Assignment Exercise 31 A new weight-watching company, Weight Reducers International, advertises that those who join w first two weeks with a standard deviation of 2.8 pounds. A random sample of 50 people who joined revealed the mean loss to be 9 pounds. At the .05 level of significance, can we conclude that thos will lose less than 10 pounds? Determine the p-value. Ho: u >= 10 Ha: u < 10 a = 0.05 Critical value Z = -1.645 Test statistc = (9-10)/(2.8/sqrt(50)) = -2.53 p-value = .0058 People joining Weight Reducers on average will lose less than 10 pounds. Exercise 32 Dole Pineapple, Inc., is concerned that the 16-ounce can of sliced pineapple is being overfilled. As is .03 ounces. The qualitycontrol department took a random sample of 50 cans and found that the At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 oun Ho: u <=16 Ha: u > 16 a = 0.05 Critical value Z = 1.645 Test statistc = (16.05-16)/(0.03/sqrt(50)) = 11.79 The mean weight is greater than 16 ounces. P-value = 0.000 Exercise 38 the Midwest revealed the following 30-year rates (in percent): 4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6 Ho: 6 μ ≥ Ha: < 6 μ xbar = 5.6375 s = 0.63457 test statistic = t = (xbar- )/(s/sqrt(n)) = (5.6375-6)/(0.63457/sqrt(8)) = -1.616 μ degree of freedom = n - 1 = 8 - 1 = 7 p-value = 0.075 We do not have enough evidence to conclude that the rates are less than 6%. A recent article in The Wall Street Journal reported that the 30-year mortgage rate is now less tha At the .01 significance level, can we conclude that the 30-year mortgage rate for small banks is le

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will lose, on the average, 10 pounds the d the new weight reduction program se joining Weight Reducers on average ssume the standard deviation of the process e arithmetic mean weight was 16.05 ounces. nces? Determine the p-value. an 6 percent. A sample of eight small banks in ess than 6 percent? Estimate the p -value.
Jolynn Weeks - Week 5 Individual Assignment Exercise 27

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Jolynn - Week 5 Individual Assignment - Jolynn Weeks Week 5...

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