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A sample of 1545 men and an independent sample of 1691 women were used to compare the amount of housework done by men and women in dual-earner marriages. The study showed that 67.5% of the men felt that the division of housework was fair and 60.8% of the women felt the division of housework was fair. Is the proportion of men who felt that division of housework was fair greater than the proportion of women who felt the division of housework was fair? Use alpha = .05 for the test.
Utilize the given degree of confidence also sample data to construct a confidence interval for population proportion.
Calculate a 95% confidence interval on the average weight of packaged mustard seed. Explain very carefully to the packaging workers what the 95% confidence interval numbers mean. Include your Excel output. Is there anything you would want to note ..
Given that Americans of Mexican ancestry constitute 79.1 % of the populations of those eligible for jury duty and given that Partida was convicted by a jury of 12 people with only 58% (7 jurors) of them that were Americans of Mexican ancestry, can..
A simple random sample is to be drawn from a population of 1200. To have 90% confidence that the sampling error in estimating p is no more than 0.03
I have computed an analysis of variance for three groups with 10 observations per group. Evaluate the degrees of freedom for the F test
Compute the relative frequencies and percentages for all classes. Draw a histogram and a polygon for the relative frequency distribution.
Suppose X is a random variable with mean u and variance sigma2, Calculate the mean vector and variance matrix of the random vector Y = (X,2+3X)?
For the following scores, find the (A) mean, (B) median, (C) sum of squared deviations, (D) variance, and (E) standard deviation:
When using the distribution of sample means to estimate the population mean, what is the benefit of using larger sample sizes?
The thickness of metal plates made by a particular machine are normally distributed with mean of 4.3 mm and standard deviation of .0.12 mm. What is the value of c for which there is 80% probability that a metal plate has a thickness with in the in..
For the 20 test scores shown, find the percentile rank for a score of 86.
Playbill magazine reported that the mean annual household income of it's readers is $219,155. Assume this estimate of the mean annual household is based on a sample of 91 house-holds and based on past studies,
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