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A random sample of 30 households was selected from a particular neighborhood. The number of cars for each household is shown below. Estimate the mean number of cars per household for the population of households in the neighborhood. Give the 95% confidence interval.
2 0 1 2 3 2 1 0 1 4 1 3 2 0 1 1 2 3 1 2 1 0 2 0 3 2 2 1 0 2
The graduate selected will be a male who is not a member of a sports team? What is the probability that the graduate will be either a female or a member of a sports team?
Determine the probability that a randomly selected sample of 31 patients would produce an average diameter of 6.6 mm or less for the non affected tendon?
An independent second stage is normally distributed with a mean of 43 minutes and variance of 10 minutes. What is the probability that the two stages take over 80 minutes?
Twenty subscribers were surveyed, it found that the annual health insurance premiums for a family with coverage through an employer averaged $10,979.00. The standard deviation of the sample was $1000.00.
A marketing firm asked a random set of married and single men as to how much they were willing to spend for a vacation. At *alpha*= .05, is a difference in the two amounts?
Whenever the calculated value of t is equal to or greater than the tabled value of t, for a given number of degrees of freedom, then
Suppose your instructor randomly surveyed his or her performance (i.e., students "graded" the teacher) over many years (assume an 'infinite' population). The frequency of ratings were as follows:
If the same sample results had been obtained from a random sample of 16 students, could the students' claim be accepted at a lower level of significance?
If Larry gets a 70 on a physics test where the mean is 65 and the standard deviation is 5.8, where does he stand in relation to his classmates?
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
A study of 200 advertising firms revealed their income after taxes: What is the probability an advertising firm selected at random has under $1 million in income after taxes?
Mmaximum error of estimate was 30. if he were to conduct a second study to reduce the maximum error of estimate to 6, about how many hard drives.
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