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The upper arm length of females over 20 years old in the United States is approximately Normal with mean 35.9 centimeters (cm) and standard deviation 2.2 cm. Use the 68-95-99.7 rule to answer the following questions. NOTE: The numerical values in this problem have been modified for testing purposes.
(a) What range of lengths (± 0.1 cm) covers almost all (99.7%) of this distribution?
Give a 95% confidence interval for the proportion of all undergraduate students who work 10 or more hours a week during the school year.
if two random samples of size 400 are drawn from two populations that have standard deviations of 60 and 8 respectively
Is a sample of 25 papers large enough to provide a good estimate of the mean score of all 42,000 students on this exam problem? Justify your answer.
a survey of 85 families showed that 36 owned at least one dvd player. find the 99 confidence interval estimate of the
Hadco Construction is a major contractor for large-scale residential, commercial and government projects. It operates a fleet of heavy duty construction equipment, for which repair and maintenance are major costs. Much of the maintenance expense..
the manager of a computer software company wishes to study the number of hours junior executives by type of industry
Let X1,..., Xn be a random sample from a population with the mean μ. What condition must be imposed on the constants c1, c2,..., cn so that c1X1 + c2X2 + ··· + cnXn is an unbiased estimator of μ?
Find the least-squares regression line - Find the least squares estimates of γ0 and β1.
Suppose this player gets to shoot three free throws. Find the probability that he makes at least one of the three consecutive free throws.
NURS 371 Homework: Probability and Normal Distribution. What two scores would divide a normal distribution such that approximately 68% of the general population
A statewide real estate sales agency, Farm Associates, specializes in selling farm property in the state of Nebraska. Its records indicate that the mean selling time of farm property is 90 days.
What is d, the difference between any 2 terms? Using the formuls for the nth term of a arithmetic sequence, what is 101st term?
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