What value would you expect to find standard deviation
A certain population has a mean of 460 and a standard deviation of 36. Many samples of size 56 are randomly selected and the means calculated. What value would you expect to find for the standard deviation of all these sample means?
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How large a sample is required to reduce the standard deviation of the percentage who say "Yes" from 7% to 3.5%? Explain to someone who knows no statistics the advantage of taking a larger sample in a survey of opinion.
in 2007 the American golfer tiger woods competed in 26 PGA golf tournament. he finished 1st seven times, 2nd three times, and one time each in 6th, 9th,12th, 15th, 22nd and 37t. find his median finishing position for the year.
How has government action in recent years encouraged increased business attention to ethical matters?
You arrive at a bus stop at 10 o'clock, knowing that the bus will arrive at some time uniformly distributed between 10:00 and 10:30. what is the probability that you will have to wait longer than 10 minutes? if at 10:15 the bus has not yet arrived
Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean of 120 and a standard deviation of 16.
Twelve case of leukemia are reported in people living in a particular census tract over a five year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cance-incidence rates?
The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes and participating in a study of risk factors for obesity. Body mass index is measured as the ratio of weight in kilograms to height in meters squared.
The following table shows the numbers of patients classified as underweight, normal weight, overweight and obese according to their diabetes status.
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