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The mileage (in thousands) for a random sample of 10 rental cars from a large rental company's ?eet is listed.
7 13 5 5 11 15 7 9 13 8
Find a 95% jackknife con?dence interval for the population mean mileage of the rental cars of this company.
a mean guy gave you a nice sample from normal distribution with known variance. so the test should be easy. but he
A production process manufacturers alternators. On the average, 1% of the alternators will not perform properly when tested in the plant. When a large shipment of alternators is received at the plant
when playing a new board game you are required to roll 6 standard six-sided dice. if x is the number of 6s rolled the
if the random variable z is the standard normal score is it true that pz lt 0 could easily be determined without
Find the z-score for each score in the population. Transfer the original population into a new population of N=5 scores with a mean of μ=60 and a standard deviation of σ=8
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportion of children are overweight?
an experiment investigated the effect of length and repetition of tv ads on students choosing to eat at del taco. all
an automobile manufacturer is concerned about a fault in the braking mechanism of a particular model. the fault can on
What is an appropriate null hypothesis to compare the quality of the product manufactured in the overseas plants and the U.S. plants? Why?
a maker of a certain brand of low fat cereal bars claims the average saturated fat content is 0.5 grams. to check the
37 percent of managers have MBA degrees. Using probability formulas. Determine the proportion of employees who are managers and have MBA degrees.
if you draw 7 cards at random from a standard deck of 52 cards what is the probability that you will get exactly two
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