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A machine produces 3 inch nails. A sample of 100 nails is selected, and it is found that 25 are shorter than 3 inches. Find the 95% confidence interval on the proportion of all such nails that are shorter than 3 inches.
In a poll of 400 randomly selected voters, 204 of them support the strategist's candidate. At = .05, is the political strategist's claim warranted?
Explain a scenario associated to final project in which you would utilize repeated-measures ANOVA. Explain a scenario associated to final project in which you would use MANOVA.
Explain probability distribution of X (name and parameters).
The cutoff (or cutoffs), and the score of the sample on this distribution. Then explain your answer to someone who has never had a course in statistics (but who is familiar with mean, standard deviation, and Z scores).
What is the probability of getting someone who is in the 23-30 age brackets or whom smokes?
Ages of 56 attendees of a Harry Potter movie are shown. (a) Form seven age classes (10 to 20, 20 to 30, etc.). Tabulate the frequency of attendees in each class.
The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100.
Probability values based on normal distribution - old exit exam followed a normal distribution
A defective picture tube was discovered in the latest shipment. What is the probability that it came from Tyson Wholesale?
A quality control engineer wanted to estimate the mean weight (in grams) of M&M candies being produced on a certain machine in the factory. After collecting an appropriate random sample of M&M candies, he obtained the following weights:
With a population standard deviation of 15. Use the 95% confidence interval. Approximately how many Kleenexes should go in the automobile glove compartment boxes?
Construct a 99 percent confidence interval for the mean commission earned by local Tupperware dealers. You may assume the commissions are normally distributed.
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