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What recommendation would you have for each state to maximize revenue? c. Which state was most likely to be following a political unsupportable policy?
The average (mean) monthly gasoline (gallon) purchase for a family with 2 cars is 62. What is the probability that the family's monthly gasoline (gallon) purchases will be more than 47 gallons?
what is the probability that the sample mean will be at least 1000? Do you need to use the central limit theorism to answer this question? explain"
The mean reading score was 51.7 and the standard deviation was 6.3. What reading score corresponds to the 65th percentile?
If several classes of 32 students are selected, what is the standard deviation of students that would not each breakfast each morning?
If a wildlife service wishes to estimate the mean number of days of hunting per hunter fo all hunters, with a bound on error of estimation of 2 days. How many hunters must be included in the survey?
It would like to be within plus or minus $25 of the true mean with a 98% confidence level. The standard deviation is thought to be $400. How many card holders should be sampled? Your company charges
Suppose that the height, in inches, of a 25-year-old man is a normal random variable with parameters μ=71 and σ²=6.25. What percentage of 25-year-old mean are over 6 feet 2 inches tall
The two major criteria for a binomial probability experiment are independence and two possible outcomes. Explain how this experiment meets these two criteria.
29 percent of the employees in a company have managerial positions, and 39 percent of the employees in the company have MBA degrees. Also, 74 percent of the managers have MBA degrees. Using the prob
Three questions at random and without replacement. What is the probability that none of the questions in the second set are the same as any of those in the first set?
a preliminary study of the fall lobster catch showed that for 35 lobsters selected at random the mean weight was 2.9 pounds with standard deviation of .6 pounds find a 90% confidence interval for th
Is there significant evidence that kmart charges higher prices? Clearly state your hypothesis and perform the test. You may take the level of significance as 1%
A market research firm conducts telephone surveys with a 30% historical response rate. What is the probability that in a new sample of 300 telephone numbers, at least 75 individuals will cooperate a
The bowling balls the sample standard deviation was found to be 0.52 pounds. Construct a 95% confidence interval for the variance of the bowling ball weight.
A sample of 25 is selected from a population of 500 items. The sample mean is 25.7 and, the sample standard deviation is 7.8. Construct a 99% confidence interval estimate of the population total.
If the manufacturer sells the parts in packages of 10 parts, what are the mean and standard deviation of the numberof useable parts in a package?
Assuming that they wish to test the claim at alpha = 0.025, determine the rejection and non rejection regions based on your hypotheses in a). State the critical value.
suppose the probability that a carton of eggs will contain at least one broken egg is 1/3. use a simulation of 20 trials to find the probability that the next three cartons will contain only unbroke
The assistant found that the average wait in the sample was 6.3 minutes. What is the probability that the sample mean would be 6.1 or more?
A newspaper article about the results of a poll states: "In theory, the results of such a poll, in 99 cases out of 100 should differ by no more than 5 percentage points in either direction from what
Mean of 340 hours and a standard deviation of 8 hours. What percentage of the bulbs have lifetimes that lie within 1 standard deviation to either side of the mean?
From previous studies, the standard deviation of the weights of elephants in this subspecies is known to be 1500 pounds. How many elephants does the researcher need to weigh so that he can be 80% c
Standard deviation of 100, what would be the cutoff score for selecting the top 10% of applicants, assuming that the standardized test is normally distributed?