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Household income does not tend to follow a normal distribution in a particular state, yet average income is approximately $45,000/year in this state, with a standard deviation of about $9000. At least what percentage of household incomes in this state is likely to be between $18,000 to $72,000/year? Show your work as to how this is obtained.
What is the probability that a randomly selected automobile manufactured by the company will have a defective microprocessor?
Suppose that the incident rate of a particulat kind of accient is 1/10,000 persons. In a town of 50,000 persons, what is the probability that there is no accident of this kind?
There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. (a) Determine the standard error of the proportion.
What is the probability that 0, 1, 2, or 3 hypertensives will be identi ed in such sibships if the hypertensive status of 2 siblings in the same family are independent events?
What was the cost for the 10 percent of employees who incurred the highest dental expense?
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
The average time a subscriber spends reading the Wall Street Journal is 49 minutes. Assume that the standard deviation is 16 minutes and the time are normally distributed .
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
Is there a significant difference in mean fetal heart rates by position? Run the test at a 5% level of significance.
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
Determine the level of measurement for these items related to the newspaper business? The following data gives the weekly amounts spent on groceries for sample of households.
Problem based on decision tree - Evaluate the strategy that maximizes the manufacturer's expected net earnings.
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