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Q1) Number of pages printed before replacing cartridge in laser printer is normally distributed with a mean of 11,500 pages and standard deviation of 800 pages. A new cartridge has just been installed.
a) Determine the probability that printer produces more than 12,000 pages before this cartridge should be replaced?
b) Find out the probability that printer produces fewer than 10000 pages?
2) Top- selling Red and Voss tire is rated 70,000 miles, that means nothing. In fact, distance the tires can run until they wear out is a normally distributed random variable with mean of 82,000 miles and standard deviation of 6,400 miles.
a) Determine the probability that tire wears out before 70,000 miles?
b) What is the probability that tire lasts more than 100,000 miles?
Sample size of only 20. Find out a 95% confidence level for population Cp.
How many samples would be needed to create a 99 percent confidence interval that is within 0.02 of true proportion of premium grade fuel-quality failures.
What is the probability that the drug will be effective for 3 hours or more?
Determine probability of generating six digits and getting code consisting of 1, 2, 3, ..., 6 if each digit can be repeated?
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
The sample information is reported below. At the .10 significance level can we conclude that there is a difference in the amounts quoted?
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
Here are the DMS odor thresholds for 10 untrained students:
If a lot is known to contain 10% defective items, find out the probability that lot will be rejected? Accepted?
Use the continuity correction and describe the region of normal curve that corresponds to the indicated binomial probability. The probability of more than 50 right answers.
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