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A student conducted a study on the height and weight of adult males. She collected data from 40 adult males and found that average height is 68.34 inches with a standard deviation of 14.02 inches, and the average weight is 172.55 lbs. with a standard deviation of 26.33lbs. Based on the above values of the standard deviations, she stated the following: "The height of adult males has considerably less variation than their weight" Do you support her conclusion? Why or why not?
The probability is 90% that the sample percentage is contained within what symmetrical limits of the population percentage?
Find the mean and standard deviation for the population and population of exam scores
Richard is one of test takers. Find out the number of questions he can expect to get right on test by random guessing.
The house of representatives has a very controversial bill that will be going to vote. To help formulate his strategy on how to get the bill passed, the chairman of the committee that has been studying the bill wishes to know if there is a divisio..
Evaluate the area under the standard normal curve that lies to the left of z = - 3.49 and simple random sample of size
The New York City Housing and Vacancy Survey showed a total of 59,324 rent-controlled housing units and 236,263 rent-stabilized units built in 194 or later.
Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
Using a previous exercise about Hallux abducto valgus (HAV) (deformation of the big toe that often requires surgery). Doctors used x-rays to measure the angle (in degrees) of deformity in 38 consecutive patients under the age 21 who came to a medi..
Construct a 99% confidence interval for the proportion of customers favoring underground installation.
A manufacturing process makes items whose weights are normally distributed. It is known that 22.57% of all the items made weigh between 100 grams up to mean and 49.18% weigh from the mean up to 190 grams. Find out the standard deviation.
How do we use a least squares regression line? Please explain in your own words. What is the range for the coefficient of determination? Please explain in your own words.
A microeconomist wants to determine how corporate sales are influenced by capital and wage spending by companies. She proceeds to randomly select 26 large corporations and record information in millions of dollars.
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