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The mean of a normal distribution probability is 400 pounds. The standard deviation is 10.
a. What is the area between 415 pounds and the mean of 400 pounds? (Round to 4 decimals)
b. What is the probability of selecting a value at random and discovering that it has a value less than 395 pounds. (Round to 4 decimals).
Determine the probability that particular call lasted between 110 and 180 seconds?
The alternative hypothesis is true. In this case the consumer advocacy group will have, A consumer advocacy group doubts this claim and tests the hypotheses
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To find the 95 percent confidence interval for the true population mean. From the results below, is it true that 95% of the sample means will fall
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
Write the linear regression equation to forecast father's education from mother's education?
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
What was the cost for the 10 percent of employees who incurred the highest dental expense?
For a study that consists of personal interviews with participants (rather than mail or phone surveys), explain why simple random sampling might be less practical than some other sampling methods.
They have collected data on gender, shoe size, and height to see if they can change their business model to include only one size of shoes regardless height or gender of the wearer.
What is the probability of getting a number less than 5 on both?
Calculate the standard error. With 95% confidence, find out the margin of error?
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