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Assume you are employed by a consumer-products rating service and your assignment is to assess car batteries. For this part of your investigation, you want to determine whether there is a difference in life of each battery. The following are the results given in months of useful battery life:
Battery Manufacturer
A B C
56 46 44
57 52 53
55 51 50
59 50 51
9781285
a. Use the analysis of variance with _ _ 0.05 to determine whether there is a difference among these three brands of batteries.
b. Suppose you are asked to make a recommendation regarding the batteries based on useful life. Use the Tukey HSD test with _ _ 0.05 to help you with your decision.
a computer laboratory manager was in charge of purchasing new battery packs for her lab of laptop computers. she
Estimate the true mean price for this particular model with 95% confidence?
Market researchers would like to know if customers prefer a well-known brand over a generic brand of soft drink. They give a large sample of people the two drinks to taste in a random order and ask them which one tastes better.
The New York Times reported (L.J> Flynn, Tax Surfing, The New York Times, March 25, 2002, p. C10) that the mean time to download the home page for the internal Revenue Service (IRS) , was 0.8 second. Suppose that the download time was normally di..
let x and s2 be the mean and variance of a random sample size n16 from the normal distribution nu gamma2a find d using
there are twelve zodiac signs and each person is born under exactly one sign. suppose that each sign is equally likely
Suppose that a certain college class contains 45 students. Of these, 26 are sophomores, 25 are chemistry majors, and 7 are neither. What is the probability that the student is both a sophomore and a chemistry major?
Average number of mosquitoes in pond is 80 per square meter with a standard deviation of 12. If 16 square meters are choses at random for a mosquiot count, find probabilty that the average of those counts is more than 83.0 mosquitoes per square me..
the cost of a college education has increased at a much faster rate than costs in general over the past twenty years.
x is a normally distributed random variable with a mean of 5.00. if the probability thatxis less than 6.32 is 0.67 as
You are told that 95% of the scores range between 300 and 660. Using the 68, 95,99.7 rule, what is the standard deviation of exam scores?
Number of STAT 200 textbook bundles you would order so that you stay below 5% probability of having to back-order from Pearson Custom Publishing?
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