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You have been hired by a new poultry company, Abdulla's fresh chicken. The company has developed a series of billboards and newspaper ads to promote their product. The reaction in an overseas test market has been positive and you have been hired to gauge the response of North American consumers. You show the billboard to 64 consumers and receive a 25% positive response.
Calculate the 95% confidence interval for the true population proportion of consumers who like the ads.
Calculate the 90% confidence interval for the true population proportion of consumers who like the ads.
You would like your margin of error to be less than .07. How large a sample must you pick at the 95% level of confidence?
The company has decided to re-work it ads and would like you test its new ads. How large a sample must you select to have a margin of error of 5% or less at 95% confidence?
You survey 100 consumers and find 70% like the new ads. Construct a 90% confidence interval for the true proportion of consumers who like the new ads.
The ancient Greeks thought that the most pleasing shape for a rectangle was one for which the ratio of the length to the width was 8 to 5, the golden ration.
Defective calculator is 10%. If 10 calculators are selected at random, what is the probability that 4 or more of the calculators will be defective?
Probability using Pareto chart - Evaluate the probability of randomly selecting an adult from the sample who doesn't always eat healthy foods because he or she has no time to cook or is confused about nutrition.
Find the 98% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 10 peaches per tree?
Which measure of central tendency would you use to summarize the data below? Which inferential test would you use to determine if there is a difference in rainfall between the sample 2 and 3?
a assuming that pairwise comparisons of the treatment means are to be made with a 90 perecent family confidence
Which of the following would be the hypothesis for testing the claim that the proportion of students at a large university who smoke is significantly different from 0.15?
Find the equation of least -squares line and plot the line on the scatter diagram of part (a)
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
What is the probability that the first marble is orange and the second marble is not orange and what is the probability of getting a jack, again a jack and finally a ten?
a set of test scores is normally distributed with a mean of 100 and a standard deviation of 15. if cases are drawn
The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test. What do you conclude?
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