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The height of women at a school are basically distributed with mean 66.4 in. and standard deviation 3.7 in. Determine the range of heights centered about the mean in which:
a. 95% of the women are found.
b. Would an 80 inch tall woman be considered unuaually tall?
The profit from selling food at an outdoor cafe depends on the number of hours of sunshine through the formula, Profit = 1000(1-(e -x /10)). Find the expected level of profit.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. Give the formula for the test statistic.
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
Describe expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a return of $25,000, or there could be a loss of $15,000?
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
Inspect table produced in question 2 above. Comment on relative sensitivity of minimum sample size to actual proportion and to desired half width.
Average performance evaluation is higher for managers hired from outside firm compared with those promoted from within? What other stories does this graph tell?
If random sample of 9 loads is selected for a weight check, determine the probability that mean weight of those loads is more than 40.60 tons.
A communication network transmits binary digits, 0 to 1, where each digit is transmitted 10 times in succession. During each transmission, there is a 0.995 probability of accurate transmission.
If the agency is risk neutral, use a decision tree to determine its best course of action.
(a) What is the relative frequency (i.e., proportion) of observations falling in the 0.260-0.280 interval? (Give your answer to four decimal places.) (b) What is the shape of the data distribution?
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
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