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A bank manager wishes to see whether there is any preference in the times that customers use the bank. Six hours are selected, and the number of customers visiting the bank is as shown here. At "alpha" = 0.01, do the customers show a preference for specific times?
TIME 10:00 11:00 NOON 1:00 2:00 3:00
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# CUSTOMERS 20 35 42 34 30 19
Probability that the entire batch will be rejected?
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
A student decided that this is a binomial distribution problem. The student found that the probability of all four engines failing is 4.1E-09. Is that answer correct?
In 2001, an estimated 78% of executives believed that age bias was a serious problem. In a 2004, 82% of the executives surveyed considered age bias a serious problem.
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If profit earned in the manufacture and sale of X units of a product is P dollars where: P = 10X - 0.001X2
Passengers using New York's MetroCard system must swipe the card at a rate between 10 and 40 inches per second, or else the card must be re-swiped through the card reader. Research shows that actual swipe rates by subway riders are uniformly distr..
Plot the data on U.S. general aviation shipments. (b) Describe the pattern and discuss possible causes. (c) Would a fitted trend be helpful? Explain. (d) Make a similar graph for 1992�2003 only. Would a fitted trend be helpful in making a predictio..
State which of the three diet colas (marked as A, B or C) he or she prefers. Draw a tree diagram depicting the sample space outcomes for the test results.
Assume you randomly sample one mouse from the colony. The probability his age will be between 55 and 70 days is?
A certain pond to check if they are significantly larger than the mean stated above. Is the mean of the sample larger population of this fish? use either L=1% or L=5%.
Explain the logic of the ordinary least Square (OLS) method? How are the least squares formulas for the slope and intercept derived?
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