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A large mail-order company with ten distribution centers had an average return rate of 5.3 percent. In an effort to reduce this rate, a set of testimonials was included with every shipment. The return rate was reduced to 4.9 percent. Write interpretations of these t-test values.
a. t = 2.10
b. t = 2.50
suppose someone gives you 9 to 2 odds that you cannot roll two even numbers with the roll of two fair dice. this means
in a large american university in 1969 the male and female professors were sample independently yielding the following
1. at one point during a fatigue test the rate of crack growth is measured as 0.57mmcycle. if the constants are known
In a lengthy manuscript, it is found that only 2/3 of the pages contain no typing errors. Assume that the number of errors per page has a Poisson distribution.
You don't have a population standard deviation but you have sample data. Calculate a sample mean and standard deviation and use the sample standard deviation value to complete the inferential test.
a study of peach trees found that the average number of peaches per tree was 825. the standard deviation of the
a production process is set to manufacture bolts with a diameter of .5 inches. the process has a standard deviation of
ABC Trucking Company purchased 15 trucks at the same time to start their business. 5 Trucks were purchased from Peterbilt, 5 from Freightliner, and 5 from Kenworth.
What do all of the documents tell you about the issues and problems that were affecting people's behavior around 1900?
Your high school graduating class had 564 members. Thirty-three percent of these are expected to attend college. The probability that less than 160 will attend college is
according to the national institute on alcohol abuse and alcoholism niaaa and the national institutes of health nih 41
Three cards are randomly selected from an ordinary deck of cards without replacement Compute the probability that the first card is a spade given that the second and third are spades.
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