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Air pollution in large U.S. cities is monitored to see whether it conforms to requirements set by the Environmental Protection Agency. The following data, expressed as an air pollution index, give the air quality of a city for 10 randomly selected days.
57.3 58.1 58.7 66.7 58.6 61.9 59.0 64.4 62.6 64.9
Construct a 95% jackknife con?dence interval for the actual average air pollution index for this city and interpret.
He surveys a sample of 40 students and finds that for the most recent semester their average cost was $430 with a standard deviation of $80. What is the test value for this hypothesis test?
a survey of affluent americans those with incomes of 75000 or more indicated that 56 would rather have more time than
The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes.
question a market researcher wants to test to determine if families of four in city a spend less per week on average
Use the correct formula to find the probability that, out of 10 customers, exactly 5 are familiar with the product. Show your calculations or explain how you found the probability.
An auditor for a Health Maintenance service of Georgia reports 40% of policyholder 55 years or older submit a claim during the year. Fifteen policyholders are randomly selected for company records.
in the biomedical engineering field a study of coronary artery disease had three possible partitioning events b1 the
Convert each of the following z intervals to x intervals.
1. Calculate the mean, median, and standard deviation for ounces in the bottles. 2. Construct a 95% Confidence Interval for the ounces in the bottles.
Compute the marginal frequencies. (List the totals for the age groups and localities). What percent of the urban dwellers are over 50? What percent of the Over-50 residents live in rural areas?
Use Chebyshev’s Inequality to solve this problem. Show your work. A machine used to fill cereal boxes dispenses on average µ ounces per box. The manufacturer wants the actual amount dispensed, Y , to be within 1 ounce of µ at least %93 of the time. W..
construct charts for individuals using bothnbsptwo-period andnbspthree-period moving ranges for the following
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