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A survey of households in a small town showed that in 500 of 1,200 sampled households, at least one member attended a town meeting during the year. Using the 95% level of confidence, what is the confidence interval for the proportion of households represented at a town meeting? Find the sample proportion. Calculate the standard error. Find the corresponding z-value to use for a proportion with a 95% confidence level. Construct the 95% confidence interval for the proportion of households represented in a town meeting.
in order to determine how many hours per week freshmen college students watch television a random sample of 256
a study of cardiovascular risk factors compared heavy smokers light smokers and nonsmokers. both men and women were
an irate student complained that the cost of textbooks was too high. he randomly surveyed 36 other students and found
The data (in milliamps) are shown below. Using the .05 level of significance, are there any differences in the three categories.
Is there meaningful relationship between grades and SAT scores? If student scores 450 on the SAT, what do youbelieve his or her GPA will be?
Suppose that your sample mean is 1175 and that your sample standard deviation is 100. Using α=0.05, what is the appropriate conclusion you should draw from your sample?
construct a frequency distribution table and describe the shape of the distribution, what score identifies the center for the distribution and are the scores clustered or spread across the scale?
The advertising agency promoting the new Keem dishwashing soap wants to get the best exposure possible for the product within the $100,000 advertising budget ceiling placed upon it.
an accounting firm is planning for the next tax preparation season. from last years returns the firm collects a
The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Construct a stem-and-leaf diagram for the data:
1.consider a small experiment to investigate if biofeedback can reduce blood pressure. six subjects were randomized to
If the proposed textbook receives a favorable review, how should the editor revise the probabilities of the various outcomes to take this information into account?
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