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Refer to given Exercise.a. What is the population of interest to the faculty senate?
b. What is the sampling frame?
c. What is the sample?
d. Is the sample representative of the population of interest? Explain.
Exercise The faculty senate at a large university wanted to know what proportion of the students thought that a foreign language should be required for everyone. The statistics department offered to cooperate in conducting a survey, and a simple random sample of 500 students was selected from all students enrolled in statistics classes. A survey form was sent by e-mail to these 500 students. For parts (a) to (c) discuss the extent to which the specified type of bias would be likely to occur in this survey:a. Selection bias.
b. Nonresponse bias.
c. Response bias.
d. Which of these three types of bias do you think would be the most serious? Explain.
in a study of exercise a large group of male runners walk on a treadmill for 6 minutes. their heart rates in beats per
How many hamburgers must the restaurant stock to be 98% sure of not running out on a given day?- Why is the independence assumption in part c probably not realistic?
Question: What is the difference between Alpha and P-Value and its Statistical Significance?
The average thickness of books on a library shelf is 8.3 centimeters.the standard deviation is 0.6 centimeter. If 20% of the books are oversied, find the minimum thickness of the oversized books on the library shelf.
Scores on an exam appear to follow a normal distribution with μ = 60 and σ = 20. - For what range of scores should a D be given? - What percentage of the students will get a D?
Determine the probability that a butterfly is infected, given that it was tagged in both places. Enter an answer between 0 and 1, rounded to 2 decimal places, e.g. 0.31.
review the following information from the article a cost-benefit analysis of the new orleans flood protection system by
ltbrgt1. the following data contains the cost in cents per 1-ounce serving for a sample of 7 chocolate chip cookies.
Ffinding that the mean sodium content is 324 mg, with a standard deviation of 35 mg. Find a 95 % confidence interval for the mean sodium content of this brand of hotdog.
Refer to b. All these variables were statistically significant in the stepwise model to predict yield strength. Do you agree with this decision? Explain.
Convert these data to relative frequency distributions, one for the total United States, the other for the western states. Do the results appear to suggest any differences between total U.S. prices and those in the western states?
Many advisers recommend using roughly 20% foreign stocks to diversify portfolios of U.S. stocks. You see that the 500 Index (U.S. stocks) and Diversi?ed International (foreign stocks) Funds had almost the same mean returns.
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