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According to a nationwide survey, 60% of parents with young children condone spanking their child as a regular form of punishment. (Tampa Tribune, Oct. 5, 2000.) consider a random sample of three people, each of whom is a parent with young children. Assume that x, the number in the sample who condone spanking, is a binomial random variable.
a. What is the probability that none of the three parents condones spanking as a regular form of punishment for their children?
b. What is the probability that at least one condones spanking as a regular form of punishment?
c. Give the mean and standard deviation of x. Interpret the results.
If 3 different factor levels show a lot of variation between levels this implies:
Determine the probability that exactly 8 of them started smoking before 18 years of age.
Determine her weighted mean grade? What letter grade did she earn? (A, B, C, D or F).
If a sampleof50 customers is selected on a given day, what is the probability, given your selected delivery time that fewer than 3 customers will receive a free newspaper?
Ssample by constructing a histogram and finding the sample mean and standard deviation, are we investigating the sampling distribution of the mean? why or why not?
Find the probability that the carbon monoxide concentration exceeds 9 ppm during a randomly selected one-hour period.
Determine the mean, median, and range for each of two data sets. b. Determine standard deviation using rule of thumb for each of data sets.
The population standard deviation for both groups is 6. At α = 0.01, is there a difference in the cholesterol levels between the two groups? Find the 99% confidence interval for the difference of the two means.
You have administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items.
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
A magazine article stated that the average age of women who are getting married for the first time is 26 years. A researcher decided to test this hypothesis at α = .02. She selected a sample of 25 women who were recently married for the first time..
Find the probability that among 8 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.
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