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Shank's, Inc., a nationwide advertising firm, wants to know whether the size of an advertisement and the color of the advertisement make a difference in the response of magazine readers. A random sample of readers is shown ads of four different colors and three different sizes. Each reader is asked to give the particular combination of size and color a rating between 1 and 10. Assume that the ratings are approximately normally distributed. The rating for each combination is shown in the table following (for example, the rating for a small red ad is 2). Is there a difference in the effectiveness of an advertisement by color and by size? Use the 0.05 level of significance.
Color of Ad
Size of Ad
Red Blue Orange Green
Small 2 3 3 6
Medium 3 5 6 7
Large 6 7 8 8
What statistical method is used to accept or reject the null hypothesis in determining if outsourcing is always beneficial? Please explain your reasons for choosing the selected method in detail and cite references (if any).
It is known that 60 percent of all registered voters in the 42nd congressional District are Republicans. There registered voters are selected at random from the district. Compute the probability that exactly 2 of the 3 selected are Republicans, u..
A survey of 300 union members in New York reveals that 112 favor the Republican candidate for governor. Construct the 98% confidence interval for the true population proportion of all New York State union members who favor the Republican candidate..
A researcher obtains t = 4.00 and MD = 9 for a repeated-measures study. If the researcher measures effect size using the percentage of variance accounted for, what value will be obtained for r2?
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, & 10.
Determine the probability that none of the calculators will be defective?
Compute mean yearly value using average gas prices by month found in "Final Project Data Set." Using years as your x-axis and annual mean as your y-axis, design scatterplot and linear regression line.
A description of how you believe statistics can enrich and represent the results of a study, and an explanation of how statistics can be used to misrepresent the results of a study.
The gambler is paid later as follows, depending on the number of winners he picked. What is his expected gain? Remember, a loss is a negative gain, and that the bookie keeps the gambler's $20.
A monthly budget of $100,000 is available for both advertising and purchase of the fragrances. Develop and solve a linear optimization model to determine how much of each type of perfume should be produced to maximize the net profit.
Find out the upper and lower bounds on average life expectancy of the Canadian women such that at least 90% of all population is included.
Calculate an 85% confidence interval for the population mean number of wolf pups per den at southwestern United States (US).
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