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In the academic year 1997-1998, two random samples of 25 male professors and 23 female professors from a large university produced a mean salary for male professors of $58,550 with a standard deviation of $4000 and an average for female professors of $53,700 with a standard deviation of $3200. At the 5% signi?cance level, can you conclude that the mean salary of all male professors for 1997-1998 was higher than that of all female professors? Assume that the salaries of male and female professors are both normally distributed with equal standard deviations.
When determining the sample size necessary for estimating the true population mean, which factor is not considered when sampling with replacement
What is the predicted mean probability of hypertension during pregnancy for women of social class III who smoke 20 or more cigarettes per day?
the cranston hardware company is interested in estimating the difference in the mean purchase for men customers versus
the arizona department of transportation wishes to survey state residents to determine what proportion of the
life expectancies for men and women were measured by country. it was found that the average male life expectancy was
A certain airplane has two alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is.02.
Findings on the relationship between temperature anomalies over these period segments and CO2.
Standard deviation of 44.7 mg/dL. Let x signify serum total cholesterol level for U.S. females 20 years old or older. Draw the distribution of the variable x.
the average expenditure on valentines day was expected to be 100.89 usa today february 13 2006. do male and female
in a random sample of 200 people 60 were found to participate. a two-sided 95 confidence interval for the true
The true proportion of tall peas (based on a 3:1 phenotypic ratio) is 3/4 or p = 0.75. What is the probability that 5 are tall and 5 are dwarf.
it is well known that the time it takes to be served an order of wings at a downtown bar from the moment of placing the
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