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The Director of Admissions at Rutgers University is preparing a report for the New Jersey Department of Higher Education regarding the demographics for entering classes. The director wanted to estimate the age of students enrolled. The estimate must be within 1 year of the population. Assume that ages are normally distributed.
a) Determine the minimum sample size to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.2 years.
b) Repeat (a) with a 99% confidence interval.
c) Which level of confidence requires a larger sample size? Explain.
Construct a 95% confidence interval for the proportion of people disagreeing with the statement.
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Solve the mean and standard deviation equations
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The board of directors of Saner Automatic Door Company consists of 12 members, 3 of whom are women.
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? Compute the value of the test statistic.
What is the probability that 0, 1, 2, or 3 hypertensives will be identi ed in such sibships if the hypertensive status of 2 siblings in the same family are independent events?
The average monthly cost per household for groceries in kentucky is $625/mo with a standard deviation of $125/mo. The average age of the memebers in each of the households in Kentucky is 22.5 yr with a standard deviation of 5.175 yr. Which data se..
We are 95% confident that the proportion of non sell-able items for Whole Fruits is anywhere between 6.4% and 15.6% HIGHER than the proportion of non sell-able items for Green Grocer.
Following data represent concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Sample standard deviation is?
An F statistic is any statistic that follows an F distribution. Which of the following are true about F statistics and f distribution? Select all that apply
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
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