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Telephone pollsters often interview between 1000 and 1500 individuals regarding their opinions on various issues. Does the performance of colleges' athletic teams have a positive impact on the public's perception of the prestige of the institutions? a new survey is to be undertaken to see if there is a difference between the opinions of men and women on this issue
a) If 1000 men and 1000 women are to be interviewed, how accurately could you estimate the difference in the proportions who think that the performance of their atheltics teams has a positive impact on the perceived prestige of the institutions? Find a bound on the error of estimation?
b) suppose that you were designing the survey and wished to estimate the difference in a pair of proportions, correct to within .02, probability .9. How many interviewees should be included in each sample?
Suppose that 50% of all people are opposed, evaluate probability of getting at least 89% opposed in survey of 1012 randomly selected people.
A local bank reported to the federal government that its 5,246 saving accounts have a mean of $1,000 and standard deviation of $240.
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Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
The diameters of grapefruits in certain orchard are normally distributed with mean of 6.95 inches and a standard deviation of 0.75 inches. Show all work.
A two-way ANOVA model was used to analyze an experiment with two levels of one factor, three levels of a second factor, and 6 observations per treatment combination.
Data in table represent number of consumer complaints against major U.S. airlines. If one complaint from table is arbitrarily chosen, determine the probability that it was filed against United Airlines.
Relatively speaking, who performed better on the test, you, with an 86, or your friend? Why?
A doctoral student is designing a research study. She is hoping that the results of the study are statistically significant. What type of p-value would she want to obtain? Select one of the following.
If the voice identifications were made by random guess, find the probability that all 9 victims would select the same person?
Consider in you response how the concepts of a population (and its associated parameters) and the sample (and its associated estimates) fits into the discussion.
Determine the standard deviation of difference between Sarah's and Richard's scores?
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