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In a random sample of five microwave ovens, the mean repair was $80.00 and the standard deviation was $11.50. Assume the variable is normally distributed and use a t-distribution to construct a 99% confidence interval for the population mean. What is the margin of error of the population mean?
Find the proportion of employees who are managers and have MBA degrees.
what are the z scores above and below the mean that contain the middle 90 of a normal
Small bag of Skittles candies has following assortment: red (12), blue (5), orange (15), brown (0), green (16), and yellow (7). Create the probability distribution for x.
What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?
Using a normal distribution with a mean of 1118 and a standard deviation of 52 for the weights of steers, what percent of steers weigh over 1250 pounds, under 1100 pounds, between 1000 and 1150 pounds.
Determine the mean number of times the machine was used per day.
A study of 25 graduates of four-year colleges by the American Banker's Association revealed the mean amount owed by a student in student loans was $14,381.
Test the claim that the Snickers bars have a mean weight that is different than 20.1 grams. Because shutting down the plant is very expensive, test the claim at the .01 level of significance.
for the dataset test if there is a difference in mean premiums in the provinces between 2004 and 2005 using ? 0.01 and
Give an example of a function using a set of at least 4 ordered pairs. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and 5.
effects of cocaine on children-researchers conducted a study to assess the effects that occur when children are exposed
abc manufacturing has 8 machines that perform a particular task. breakdowns occur frequently for this machine. past
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