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Shell Oil office workers were asked which work schedule appealed most: working five 8-hour days or four 10-hour days (USA Today, September 11, 2000). Let p equal the proportion of office workers preferring the four 10-hour day schedule. Test the hypotheses Ho: p=0.50 and Ha: p ≠ 0.50 at α = 0.01. A Sample of 105 office workers showed that 67 workers preferred the four 10-hour day schedule. What is your conclusion? Is a statistically significant preference indicated between the two schedules?
1. Establish the null hypothesis (H0) and the alternate hypothesis (Ha).
2. Indicate the level of significance, and determine critical, ZCR
3. Compute the test statistic and determine the P-value.
4. Formulate a decision rule based on steps a, b, and c above.
5. Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
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An experiment consists of making 80 telephone calls in order to sell a particular insurance policy.
A bag of jelly belly candies contains the following colored jelly beans: red (10), blue (2), orange (5), brown (21), green (0), and yellow (18). Construct the probability distribution for x.
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Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
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