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The following is a list of P/E ratios (current stock price divided by company's earnings per share) for companies.
57 53 50 46 42 35 31 56 52 49 45 30 30 30 55 55 55
Draw the histogram for these data using an initial class boundary of 29.5 and a class width of 6. Note that you can add or remove classes from the figure. Label each class with its endpoints.
A steel pipe fittings company claims that the yield strength of its nontempered couplings is more variable than that of its tempered couplings. A random sample of nine tempered couplings has a standard deviation of 13.1 megapascals
What is the Population standard deviation of In a particular hospital, newborn babies were delivered yesterday. Here are their weights (in ounces).
How would you choose an appropriate level of significance for your statistical test? What are the possible outcomes and limitations of your statistical test?
In a sample of 210 men, 35 prefer sugar free soft drinks. In a sample of 220 women, 42 prefer sugar free soft drinks. Using a significance level of 0.05, test whether women prefer sugar free drinks more than men. Calculate the p-value.
Identify your research question, your research (alternative) hypothesis, and your null hypothesis. Also, identify your independent and dependent variable.
We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.
A recent research report shows that the percentage of college students who have been reported for plagiarizing has reached 30% each in the colleges of Education, Arts and Sciences, and Business, but only 10% in the School of Law.
Use a 95% CI to estimate the difference between the proportions of men and women managers who are married. Interpret the interval and what is the conclusion in terms of the populations from which the samples were drawn.
A standard deviation of 36 donuts. If a sample of 16 stores results in a sample average of 249 donuts what is the standard error of the mean?
What is sampling error? Could value of sampling error be zero? If it were zero, what would this mean?
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
She has been a victim of domestic abuse at some point in her life. Find the probability that more than 22 of the women sampled have not been the victim of domestic abuse.
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