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The number of pages printed before replacing the cartridge in a laser printer is normally distributed with a mean of 11,500 pages and a standard deviation of 800 pages. A new cartridge has just been installed.
Part a) What is the probability that the printer produces more than 12,000 pages before this cartridge must be replaced?
Part b) What is the probability that the printer produces fewer than 10,500 pages?
Suppose you want to estimate the mean weight of all the people in your locality. You set up a table outside a park asking for volunteers to tell you their weigh
Let X = the total number of red balls drawn. Tabulate its probability function. Find p and as. Graph. (b) Repeat (a), for Y = the total number of blue balls.
According to the test, their IQ scores are 120, 108, 135, 98 and 110. What is the sum of squares of the deviations of their IQ scores
consider 50 independent flips of a coin having probability 0.4 of landing on heads. we say that a changeover occurs
Determine the mean of the sampling distribution of p and the standard deviation of p. P=0.541, n=1100, and the population size is 25,000.
A random sample of 52 groups gave a mean of $8.30 with a standard deviation of $2.42. Find a 90% confidence interval for the mean amount left by all groups.
Refer to Microcomputer components Problem 12.9. The analyst has decided to employ regression model (12.1) and use the Cochrane-orcutt procedure to fit the model.
The probability of making a successful sale is 0.58. What is the probability the salesman will make at least 18 sales for the week (Binomial distribution).
At a college, 70 percent of the students are women and 35 percent of students receive grade of C. About 20 percent of students are neither female nor C students. Use this contingency table.
What is the probability that person 2 takes less than 90 seconds to complete the task - What is the probability that exactly one person completes the task
Draw the Normal model for tree diameters.- What size would you expect the central 95% of all trees to be?- About what percent of the trees should be less than an inch in diameter?
Under the column "criteria" list each of the criteria that are used in selecting a final model. In the column "rank" specify the order of importance.
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