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The report stated 88% of children are covered under health insurance. How large a sample is needed to estimate the true proportion of covered children with 90% confidence with a confidence interval of .05.
According to the Chebyshev rule, at least what percentage of the observation in any data set are contained within a distance of 3 standard deviations around the mean.
Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote.
A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations are selected at random and scored. The test scores are 56, 85, 65, 86, and 93. At 98% confidence, ..
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report?
Four of calculators are selected to be sent to local high school. How many selections can be made using original shipment?
As sample size increases, the standard error of M _______________ .
Determine a random number generator and make simulated data for not more than 25 participants (test subjects) in study using ranges of values for variables you established above.
Illustrate a quantitative assessment of what our charts would look like and what these new targets would do to our operations.
At the .05 significance level, can we conclude that there is a difference in their mean times?
Determine the probability that their SAT scores will differ by more than 50 points?
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
For each of the following studies, say whether you would use a t test for dependent means or a t test for independent means.
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