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A brake pad manufacturer claims its brake pads will last for 38,000 miles. You work for a consumer protection agency and you are testing this manufacturer's brake pads. Assume that the life span of brake pads are normally distributed. You randomly select 49 brake pads. In your tests, the mean life pad of the brake pads is 37,650 miles. Assume standard deviation of the population of brake pads is 1000 miles.
A. Assuming that the manufacturer's claim is correct, what is the probability the mean of the sample is 37,650 miles or less?B. Using your answer from part (A), what do you think of the manufacturer's claim?C. Would it be unusual to have an individual brake pad last for 37,650 miles? Why or Why not?
Find the Binomial Probability Distribution, n=25 and p = .40 Find the probability P(8
Suppose that four American adults are asked if they ate at table-service restaurants last week. What is the probability that all of them say yes?
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
Hypothesis testing of single mean - can we conclude that the mean weight is greater than 16 ounces? Determine the p -value.
Why are samples studied when we want to know about populations? Why are random samples used instead of just any sample? How would you determine an appropriate sample size?
Determine the probability that 5 or less questionnaires will be returned? Compute also probability that 7 or more questionnaires will be returned.
The average number of putts per hole for each player and their average driving distance is used to predict their total winnings using the multiple regression model where the deviations εI are assumed to be independent and Normally distributed with..
Identify the sensitivity ranges for the profit of a sausauge biscuit and the amount of saisage available. Explain these sensitivity ranges
We wish to estimate the population proportion. We want to be 95 percent confident of our results and we want the estimate to be with .01 of the population parameter. No estimate of the population proportion is available. What value should we use f..
To be from the same population? You may assume the that follows a normal distribution. values are: 2.13 1.31 1.91 1.92 1.77 1.64 2.29 1.99 2.33 2.49 2.22
About 5.5 percentage points in either direction from what would have been obtained by seeking out all Ohio State University female students." Do your results agree with this statement?
A random sample of n=9 men between 30-39 years old is asked to do as many sit ups as they can in one minute. The mean number is x=26.2 and the standard deviation is s=6. Find a 95% confidence interval for the population mean.
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