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The lifetime of a particular brand of laptop follows a normal distribution with mean and standard deviation equal to 2.4 and 0.5 years, respectively. Assume this brand of laptop is guaranteed for 2 years,
a. What percentage of this brand of laptop is likely to be operating 3 years after purchase?
b. What percentage of this brand of laptop that would expect to fail during the guarantee period?
c. What guarantee period should the manufacturer of this laptop choose, if they want to ensure that no more than 10% of the laptops require replacement within the guarantee period?
d. What would be your answers in (a) through (c) if the standard deviation of the lifetime of this type of laptop were 1 year?
The weights of domestic, adult cats are normally distributed with a mean of 10.42 pounds and a standard deviation of 0.87 pounds. A cat food manufacturer sells three types of foods for underweight, normal, and overweight cats.
Of the 180 left-handed students, 93 reported at least one injury, and 619 of the 1716 right-handed students reported at least one injury in the same period. Calculate the 95% confidence interval for the proportion of stu- dents with at least one i..
The corporation there's a pretty good chance the average number of days absent would be 12 or more. that's what happened to us chance variation. Is this a good defense? Justify your answer.
Prepare a Histogram for Youngsters Involved in Road Accidents
You are estimating the install hours for an electronics upgrade based on the number of components affected. The upgrade for which you are estimating affects 25 components. Given the following equation, select the correct response from each pair.
in new york city the average response time for calls to the first depatrment is a bout 5 minutes with a standarrd
The study involved 205 patients who were given either a treatment consisting of a combination of folic acid, vitamin B12, and vitamin B6 or a placebo for 6 months. Explain why a placebo group was used in this experiment.
a company decides to add a new program that prepares randomly selected sales personnel to increase their number of
find a closed form for the moment generating function of a discrete uniform random variable that is for the random
Complete the table and answer the following questions. Use the .05 significance level.
10 squirrels were found to have an average weight of 9.6 ounces with a sample standard deviation is 0.30. find the 99
Based on the table on the front of the test, perform the following tasks:Graph and plot the 16 points (Use the blank graph on the next page of this test).
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