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Use the given information to find the minimum sample size required to estimate an unknown population mean. How many adults must be randomly selected to estimate the mean FICO score of working adults in a country? We want 90% confidence that the sample mean is within 4 points of the population mean, and the population standard deviation is 61. What is the minimum sample size required?
the number of lightning strikes on a square kilometer of open ground in a year has mean 6 and standard deviation 2.4.
A committe studying employer-employee relations proposed that a rating system be adopted. Each employee would rate his or her inmediate supervisor and in turn the supervisor would rate each employee.
The pet-drug market is growing very rapidly. Before new pet drugs can be introduced into the market place, they must be approved by the U.S. Food and Drug Administration.
The ages of the cadets in the sample will form a normal distribution.
The standard deviation of 0.01 inches. What is the probability that a randomly selected pencil will be less than 0.285 inches?
An insurance company states that 90% of its claims are settled within 5 weeks. A consumer group selected a random sample of 100 of the company's claims and found 75 of the claims were settled within 5 weeks.
Clearly identify the independent and dependent variables you would study, including the number of levels of the independent variable.
an environmental group is interested in studying the effects of engine size cubic inches on the gas mileage of cars
in the pharmaceutical industry quality engineers are responsible for maintaining the quality of drug products produced
He will then compare the season batting averages of group A (those with ballet training) and group B (those without ballet training) by comparing the mean of group A with the mean of group B.
economics is about allocation of limited resources to their best use. similar to the rest of economy healthcare sector
according to the national association for college admissions counseling and usa today. 19.8 of college students take at
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