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Long Life Battery Company makes car batteries. After years of product testing, the company knows their batteries follow a normal distribution with a mean lifespan of 45 months and a standard deviation of 7 months. The company guarantees that batteries with a short lifespan will be replaced free of charge. If Long Life does not want to make refunds for more than 10% of its batteries under the full-refund guarantee policy, for how long should the company guarantee the batteries?
What equation should be used for this problem
z= x- µ σ or p(x)=(nCx)px 1- p ( )n-x or x = µ + z σ
or z= x - µ σ n e) None of the above are correct.
Noting marked increases in weight across the population, many researchers, nutritionists, and physicians have struggled to find ways to stem the tide of obesity
A jar contains 15 red balls, 12 yellow balls, and 18 green balls. Suppose that each ball has an equal chance of being picked from the jar.
If four balls are selected randomly without being? replaced, what is the probability that of the balls? selected, three of them will be blue and one of them
The discount rate for this project is 10.5 percent. Can you show how what project payback and discounted payback periods, NPV, PI, and IRR?
What is the numerical value of the correlation between percent of classes attended and grade index?
Using the 2% significance level, can you conclude that the average 10-week recycling volume of all households having 60-gallon containers is different.
questionthe effect of exercise on the amount of lactic acid in the blood of sportsmen was examined in a study. eight
Refer to the simple linear regression relating number of employees y to age x of a fast-growing firm, Exercise 9.21 (p. 487).The SAS printout is reproduced on the next page.
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
christine wong has asked dave and mike to help her move into a new apartment on sunday morning. she has asked them both
What can you conclude from the patterns in the standardized residuals - Calculate the component of chi-square for the 1989/ No cell
there are a total of 160 practicing physician in a city. of them 75 are female and 25 are pediatricians of the 75
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