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American Demographics reported the results of a survey on the planning habits of men and women. In response to the question. "What is your preferred method of planning and keeping track of meetings, appointments, and deadlines?, 56% of the men and 46% of the women answered "keep them in my head". A nationally represented sample of 1000 adults participated in the survey, therefore assume that 500 were men and 500 were women.
a. Set up the null and alternative hypothesis for testing whether the percentage of men who prefer keeping track of appointments in their head is larger than the corresponding percentage of women.
b. Compute the test statistic for the test.
c. Give the rejection region for the test using a=.01.
d. Find the p-value for the test.
e. Make the appropriate conclusion.
What would be your best point estimate for average Sales in weeks for which Newspaper advertising were $1 million? What would be an appropriate interval estimate for this?
Construction of histogram and pie chart for continuous data
A food snack manufacturer samples 13 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 14.7 oz. and the sample standard deviation is 0.50 oz., find the 95% confidence interval of the true mean.
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Compute the unit manufacturing cost of the product under the contribution approach. Compute the effect on net income of accepting a special order for 500 units at $10 per unit assuming excess capacity.
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
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Evaluate the result in part c with the decision using the expected value approach.
Infomercials often peddle products under the guise of "studies show," While some of the products are surprisingly good, many aren't.
The standard deviation of the sample is $3,000. Interpret your findings.
Suppose that a random sample of 14 cars shows an average speed of 24.0 mph, with a sample standard deviation of 2.2 mph. Assume that the speeds of cars are normally distributed. Using the T-table, what is the p-value?
A simple random sample of 50 adults is obtained, and each person's red blood cell count (in cells per microliter) is measured. The sample mean is 5.23 and the sample standard deviation is 0.54. Use a 0.01 significance level to test the claim that ..
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