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Year of 1980 more than 35% of cars purchased had a manual transmission. by 2007 the proportion had decreased to 7.7% A random sample of college students who owned cars revealed the following out of 127 cars, 23 had stick shifts. Estimate the proportion of college students who drive sticker with 99% confidence. Round your answers to three decimal places.
A family has 5 children and 1 of them is a boy...the percentage of boy is 1/5, or .020. Do you think one could say the chances of any woman having a boy would be 1/5? Explain your answer.
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
Item weights in the CPI. The cost of buying a house (with the investment component removed) makes up about 22% of the CPI.
assume that iq scores are normally distributed with a mean of 100 and a standard deviation of 15. if a sample of 70
Suppose that lifetimes of light bulbs produced by a certain company are normal random variables with mean 1000 hours and standard deviation 100 hours
Jorge's score on Exam 1 in his statistics class was at the 64th percentile of the scores for all students. His score falls at the mean score for all students.
Suppose that for a particular flight involving a jumbo-jet with 265 seats, the airline sells 278 tickets. What is the probability that the airline will not have enough seats for all the ticket holders who show for the flight?
What is the point estimate of the difference between the two population proportions?
The service time for customers at Stylum Barber Shop follows a normal distribution with a population standard deviation of 2 minutes. At the beginning of the fiscal year, the owner conducted a time study of 25 customers and discovered that the mea..
calls to a customer service center last on average 2.3 minutes with a standard deviation of 1.2 minutes. an operator in
According to the test, their IQ scores are 120, 108, 135, 98 and 110. What is the sum of squares of the deviations of their IQ scores
What is the expected number of visits given that a patient has had at least one visit?
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