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A manufacturer claims that the life span of its tires is 49,000 miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of the tires are normally distributed. You select 100 tires at random and test them. The mean life span is 48,806 miles. Assume σ = 900. Complete parts (a) through(c). (a) Assuming the manufacturer's claim is correct, what is the probability that the mean of the sample is 48,806 miles or less? (Round to four decimal places as needed.)
Statistics students were asked to fill one-cup measuring cups from boxes of Kellogg's Raisin Bran cereal, and then to count the number of raisins in the one-cup serving. The results, from 13 students, were sampled and are shown here. 23, 33, 44, 3..
Suppose we want to compare the observed and expected number of events among the group 250 treatments.
in constructing a confidence interval for a mean with unknown variance with a sample of 25 items bob used z instead of
an important factor in selling a residential property is the number of people who look through the home. a sample of 15
Find the stationary distribution of the Markov chain.
question a dam can be lowered by 4 meters using spillway a in 4 hours or by spillway b in 6 hours also lowering the
you are given a loan on which interest is charged over a three year period as follows1 an effective rate of discount of
Construction of confidence interval for difference between first and second sample mean revealed interval to be 10 plus or minus 12. We conclude.
An orange juice producer buys only one kind of oranges. The amount of juice squeezed from each of these oranges is approximately normally distributed with a mean of 4.2 ounces and a population standard deviation of 1 ounce.
What are the advantages and disadvantages of index numbers
a university system enrolling hundreds of thousands of students is considering a change in the way students pay for
a researcher is interested in the effect of st. johns wort on memory. a group of 25 college students is selected to
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