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A random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of $29.97.
a) Find a 95% confidence interval for the mean price of all summer sleeping bags.
b) What is the margin error?
You may assume the sample data comes from a population that follows a normal distribution. Using a .05 level of significance test the company's claim.
Salary information for a random sample of male and female employees of a large company is shown below.
Must you assume that the population amount of paint per can is normally distributed here? Explain
A baseball player hits 59 home runs during a season with 161 games. What is the empirical probability that the player would hit at least one home run during any given game of the season?
They both want to know what family member typically does the research about possible honeymoon destinations, and who primarily makes the decision on selecting the destination.
What is the probability that a visually impaired student gets less than 6.9 hours of sleep?
A committee of three is selected at random from a set consisting of five Democrats, eight Republicans, and two Independents.
The probability that an American CEO can transact business in a foreign language is .20. Ten American CEOs are chosen at random.(Round your answers to 4 decimal places.)
Determine regression equation. Use assets as independent variables. For fund with $400.0 million in sales, determineut five-year rate of return (in percent).
At the .01 significance level, can we conclude that there is more variation?
What happens to the confidence interval and the power of the test at a particular point of interest. As one increases the sample size of a test, all else remaining the same.
Critically discuss the mean number of children per household for these families? Round your answer to at least one decimal place.
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