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Question: A normally distributed population has a mean of 500 and a standard deviation of 60.
a. Determine the probability that a random sample of size 16 selected from this population will have a sample mean less than 475.
b. Determine the probability that a random sample of size 25 selected from the population will have a sample mean greater than or equal to 515.
service calls come to a maintenance center according to a poisson process and on the average 2.7 calls come per minute.
Plot CEO salaries against the net profit of their respective companies, do you expect to find a linear correlation between the two?
According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink now than drank then.
Of 346 vending machines tested, 12 are found to be defective. Construct the 98 % confidence interval for the proportion of all defective vending machines.
on friday wall street traders were anxiously awaiting the federal governments release of numbers on the january
Draw the graph relating Number of Faults to Line length and does the data indicate that the number of faults per mile has changed from year 2000 to year 2001?
question suppose that a is the set of sophomores at your school and b is the set of students in discrete mathematics at
a recent study of how americans get to work revealed the following dataurbanruraltotalautomobile400200600public
a sample of 40 ovservations is selected from one population. the sample mean is 102 and the sample standard deviation
In blackjack, the suit of the card is irrelevant to the game. If we do not make a distinction between the different suits, now how many different blackjack hands are there?
1. Two numbers are seleeted at random from te interval (0, I ). If these values are uniformly and independently distributed, compute the prob ability that the three resulting line segments, by cutting the interval at the numbers, can..
Assuming there is a statistically significant relationship, use the least squares method to find the regression equation to predict the advertising costs based on the number of orders received. Please use the regression procedure within Excel under T..
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