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The proportion of junior executives leaving large manufacturing companies within three years is to be estimated within 2 percent. The 0.95 degree of confidence is to be used. A study conducted several years ago revealed that the percent of junior executives leaving within three years was 25. To update this study, the files of how many junior executives should be studied?
a. 1,276
b. 3,120
c. 1,657
d. 1,801
Calculate the standard deviation for this data = since it is a case of grouped data with classes. use group or class midpoints in the formula in place of x values.
40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of significance, test to see if the proportion of voters has changed. Calculate the value of the Chi-Square Test Statistic for this problem. What is it?
for any normal distribution what z-score separates the highest 80 of the scores from the rest of the distribution?
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
The data in below represent the closing value of the Dow Jones Industrial Average (DJIA) over the 29 year period from 1979 through 2007.
in new york city in the late 1970s and early 1980s parking meter collections averaged 165 million per month with a
the piron software company currently develops marketing software for primarily service-based organizations. they are
A manufacturer of batteries for "kids' toys" wishes to investigate the length of time a battery will last. Tests results on a sample of 10 batteries indicated a sample mean of 5.67 and a sample standard deviation of 0.57.
In 2010, 65% of adult Americans thought that the death penalty was morally acceptable. In a poll conducted by the Gallup Organization, a simple random sample of 1005 adult Americans
in analysis of variance which of the following is true if the f statistic is zero?a.all of the k sample means are
question the selling prices in thousands of dollars for a sample of 15 recreational vehicles sold by getaway rvs and
Find the probability that the average of those counts is more than 81.4 mosquitos per square meter. Assume that the variable is normally distributed.
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