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A recent article in Vitality magazine reported that the mean amount of leisure time per week for American men is 40.0 hours. You believe this figure is too large and decide to conduct your own test. In a random sample of 60 men, you find that the mean is 37.8 hours of leisure per week and that the standard deviation of the sample is 12.2 hours.
Can you conclude that the information in the article is untrue? Use the .05 significance level. Determine the p-value and explain its meaning.
If you did not know anything about standard deviation of population from which sample was taken, find out the 95% confidence interval for mean test score.
Use the marginal probabilities of school quality, school cost or convenience, and other to comment on the most important reason for choosing a school.
Based on p=.60, probability that a randomly selected homeowners will say no to newspaper subscription.
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses fewer than 400 minutes?
Carry out the suitable hypothesis test, at alpha = .05, to find out whether there is a relationship between school/work and stress.
Assuming 250 of each sex, can we conclude that there is a significant difference in the proportions at a 0.05 level of significance?
You are responsible for planning the parking needed for a new 256-unit apartment complex, and you're told to base the needs on the statistic "average number of vehicles per household is 1.7."
Given that x is a normal variable with mean u = 47 and standard deviation = 6.2, find:
John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals. He calculated t = 1.9 from his data.
A large bakery buys flour in 25-pound bags. The bakery uses an average of 4,860 bags a year. Preparing an order and receiving a shipment of flour involves a cost of $10 per order. Annual carrying costs are $75 per bag.
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
Create a hypothesis and perform a series of tests to determine if there is any fundamental difference in the findings.
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