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A researcher wishes to estimate, with 95% confidence, the population proportion of adults who think the president of their country can control the price of gasoline. Her estimate must be accurate within 3% of the true proportion.a) No preliminary estimate is available. Find the minimum sample size needed.b) Find the minimum sample size needed, using a prior study that found that 42% of the respondents said they think their president can control the price of gasoline.c) Compare the results from parts (a) and (b).
Health and Nutrition Examination Survey, suppose that weights of men now are normally distributed with mean of m =172 pounds and standard deviation of s = 29 pounds.
consider the following statement each culture has its own norms of etiquette. in a diverse society like america as well
The population of lengths of aluminium coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.20 inches. A sample of four metal sheets is randomly selected from a batch. What is the possibility that t..
polychlorinated biphenyls pcbs are used in the manufacture of electrical transformers and pose a great danger to health
Construct a 95% confidence interval on the population mean for the following sample data set:
test the claim that the mean time americans spend watching tv per day is 4.4 hours at the 0.10 level of significance. a
if the probability that a tourist visiting the grand canyon will be bitten by a rattlesnake is .00002 us the poisson
find that probability that 10 or more of the 30 individuals entering the store in a given hour will decide to make a purchase.
a pizza shop offers nine toppings. no topping is used more than once. what is the probability that the toppings on a
The following data are available (number of half-gallon containers sold per day): 48, 59, 45, 62, 50, 68, 57, 80, 65, 58, 79, 69. Assuming that this is a random sample of daily demand, give a 90% con?dence interval for average daily demand for mil..
Describe the use of sensitivity analysis and postoptimality analysis in analyzing the results. Describe the characteristics of a Bernoulli process. How is a Bernoulli process associated with the binomial distribution?
Consider a 3-sigma control chart with a center line at m0 and based on n = 5. Assuming normality, calculate the probability that a single point will fall outside the control limits when the actual process mean is
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