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The distribution ages for students at the state college is positively skewed with a mean of 21.5 and a standard deviation of 3.
a. What is the probablitiy of selecting a random sample of n=4 students with an average greater than 23 ?
b. What is the probability of selecting a random sample of n=36 students with an average age greater than 23?
c. For a sample of n=36 students what is the probability that the average is between 21 and 22?
In which of the following situations is bootstrapping (and other resampling methods) often used and Which of the following is a valid description of the bootstrapping method.
Of the adult books, 70 are nonfiction while 60 of children's books are nonfiction. If the book is selected at random, determine the probability that is is?
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
Printed circuit cards are placed in a functional test after being populated with semiconductor chips. A lot contains 140 cards, and 20 are selected without replacement for functional testing.
As a part of your proposals. you need to submit demographic information to help demonstrate that the location chosen by the management teams will be a good investment.
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a 1 or 2 tail test?
A Tamiami shearing machine produced 8 percent defective pieces. The quality control engineer has been checking the output by almost continuous sampling. What is the probability that in a sample of 9 pieces:
Standard deviation of 12 what proportion of people have diastolic blood pressure less than 90. B. What proportion have diastolic pressure between 80 and 90.
data from a small bookstore are shown in the table below. the correlation for the data is 0.967. complete parts a
In large accounting firm, the proportion of accountants with MBA degrees and at least five years of professional experience is 0.75 times the proportion of accountants with no MBA degree and less than 5 years of professional experience.
a national magazine claims that the average college student watches less tv than the general public. the national
researchers conducted an experiment in which hydrogen concentration in 20 different specimens was measured by gas
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