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Assume every bus in Gainesville follows an exponential distribution with a mean of 7.5 minutes. From a bus stop, we randomly survey 100 different buses (i.e., not of the same line).
Calculate the probability that a specific bus (say, line 34) passes from the bus stop in the next 10 minutes. Then, calculate the probability that the mean of all the buses is less than 10 minutes. Explain the result, does it make sense?
1.according to recent reports 30 of americans are now classified as obese. a sample of 800 americans found that 278 of
What is the probability that a randomly selected household with a head of household in this age group had less than $70 000 in life insurance coverage?"
in a tire factor the quality control inspector examines a randomly chosen sample of 16 tires. when more than one
The Human Relations Department of Electronics Inc. would like to include a dental plan as part of the benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses?
Proportion of out-of-tolerance items is greater than 0.02, the robot will be overhauled. Otherwise it will be allowed to continue operating. What is the probability that a satisfactory robot will be overhauled unnecessarily?
444 voters to predict whether the budget will pass. Suppose the budget has 53% of the voters. What is the probability that the newspaper's sample will lead it to predict defeat?
The width of a confidence interval is equal to twice the value of the margin of error. Explain your answer. What is the first step in hypothesis testing?
What is your decision about H0 and H1 at = 0:05? Give the orderings of the population means according to the tukey procedure. Is H0 : 2 = 4 a contrast?
Choose the correct conclusion regarding the claim that the weights of statistics text vary more than the weights of text in general.
According to the regional bar assoc., 60% of people who take the bar exam pass. Find the approximate probability that at least 61% of 200 randomly selected people taking the bar will pass. Round to three decimal places as needed.
The normal distribution witha population standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CD's sold by CRA CD's Inc.?
consider the following experiment a ball is drawn without replacement from an urn containing two red and three blue
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