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The director of admissions at a large university says that 15% of high school juniors to whom she sends university literature eventually apply for admission.
In a sample of 300 persons to whom materials were sent, 30 students applied for admission. In a two-tail test at the 0.05 level of significance, should we reject the director's claim?
Determine the expected value and standard error of the sum of 400 draws?
Suppose such cattle sell at auction for 40 cents a pound. Find the mean and standard deviation of the sale prices for all the steers.
A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets
what is the difference between a population linear model and an estimated linear regression
1. the daily demand for milk in gallons at gillis grocery is n1000 100. how many gallons must be in stock at the
Whirltag claims that the useful lifetime of its dishwashers is normally distributed with a mean of 3 years and a standard deviation 1 year.
The use of coding has become particularly significant in recent years. One way to encrypt or code a message uses matrices and their properties. We start with a message coded into matrix form, called A. Multiply A by another matrix B to get AB and ..
Let X be the number of kings selected and Y the number of jacks selected. Find the joint probability distribution function.
The Speedy Oil Change Company advertised a 15-minute wait for an oil change. A sample of 23 oil changes showed a mean time of 16.5 minutes and a standard deviation of 4.3 minutes.
suppose that the hypotheses h0p.35 and hapgt.35 are to be tested. calculate the ovserved z-statistic for the sample
1. automobiles arrive at the drive-thru window at the downtown fort mcmurray post office at the rate of 4 every 10
A sample of students were asked to rank their looks compared to the looks of others on a scale from 1 to 10. A 10 means they feel they are more attractive than everyone else while a 1 means they feel they are less attractive than everyone else. Th..
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