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The distribution of diastolic blood pressures for the population of female diabetics between the ages of 30 and 34 has an unknown mean μd and a standard deviation σd = 9.1 mm Hg. It may be useful to physicians to know whether the mean of this population is equal to the mean of the general population of females in this age group, 74.4 mm Hg.
a) A sample of 10 diabetic women is selected; their mean diastolic blood pressure is x-bard= 84 mm Hg. Using this information, conduct a two-sided test at the α = 0.05 level of significance. What is the p-value of the test?
b) What conclusion do you draw from the results of the test?
c) Would your conclusion have been different if you had chosen α = 0.01 instead of α = 0.05?
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
CPI and Subway Fare Find the best predicted cost of subway fare when the consumer Price Index (CPI) is 182.5 (in the year 2000).
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
In a slow year, Deutsche Burgers will produce 2 million hamburgers at a total cost of $3.5 million. In a good year, it can produce 4 million hamburgers at a total cost of 4.5 million.
What is the probability that none can transact business in a foreign language?
The scores of college-bound senior men on the math part of the SAT followed a normal distribution with mean 527 and standard deviation 116.
Find the sample size required. A pilot study showed that the population standard deviation is estimated to be 0.09 g
What is the probability of selecting a value at random and discovering that it has a value of less than 395 pounds?
A store manager wishes to find out whether there is a relationship between the age of her employees and the number of sick days they take each year. The data for the sample are shown below:
Based on the information in (a), find a one-sided lower 90% confidence limit for m. Also, find a one-sided upper 90% confidence limit for m.
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
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