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Nissan sold three models of cars in North America in 1999: Sentras, Maximas and Pathfinders. Of the vehicles sold, 50% were Sentras, 30% were Maximas and 20% were Pathfinders. In the same year 12% of the Sentras, 15% of the Maximas and 25% of the Pathfinders had a defect in the ignition system.
1. I own a 1999 Nissan. What is the probability that it has the defect?
2. My 1999 Nissan has the defect. What model do you think I own? Why?
Twenty three percent of automobiles are not covered by insurance. On a particular weekend, 35 automobiles are involved in accident.
assume that the mean sat score in mathematics for 11th graders across the nation is 500 and that the standard deviation
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?"
Using data from Boston, Massachusetts, a test of independence is run on the claim that ice cream sales per month and the number of car wrecks per month are independent. The claim is rejected.
A new president at Big State University has made student satisfaction with the enrollment and registrations process one of her highest priorities.
A simple random sample of 1600 families is chosen. What is the chance that between 9% and 11% of the sample families will not own car?
a researcher is considering using 90 confidence interval for his research project instead of 95. what happens to the
He can award a bonus to 20 percent of the representatives. What is the cutoff point between those who earn a bonus and those who do not?
To test the effectiveness of a new studying strategy, a teacher randomly divides a sample of 8 students into tow groups, with n = 4 in each group.
A random sample of 16 ages is drawn from the population, and we find the sample mean of these observations to be μ = 8.76. What is the value of the test statistic?
Lab technicians at a major mdical lab can process an average of 400 blood samples a day with a standard deviation of 50 samples. The processing follows a normal distribution.
A random sample of 121 checking accounts at bank showed an average daily balance of $280 the standard deviation of the population is known to be $6. Find the standard error of the mean.
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