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The article "Birth Order and Political Success" (Psych. Reports, 1971: 1239-1242) reports that among 31 randomly selected candidates for political office who came from families with four children, 12 were firstborn, 11 were middle born, and 8 were last born. Use this data to test the null hypothesis that a political candidate from such a family is equally likely to be in any one of the four ordinal positions.
She has a history of being successful at getting a donor on 55 percent of her calls. If June has a quota to get at least four donors each day.
An investment firm with 10,000 clients would like to accurately forecast the average dollar amount their current customer will deposit over the coming year.
Create the 90% confidence interval for difference in average damage amount for two kinds of SUVs. Interpret this interval.
suppose y is a data matrix and z yf for some orthogonal matrix f so that z is a rotated version of y. show that the
we receive a shipment of 200 units of which 18 are defective. we test 10 units at random and we model the number k of
What is the 95% confidence interval for the difference between the mean prices of the two models?
A bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes that the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes.
Find the probability that all four adults are very confident in the nutritional information on restaurant menus. Find the probability that none of the four adults are very confident in the nutritional information on restaurant menus. Find the probabi..
A company is creating 5 new divisions and 8 managers are eligible to be appointed head of a division. With 8 managers trying for 5 jobs, how could the five new heads be arranged?
Calculate P value? Calculate critical value?
Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second factory, 350 chips are sampled. The proportions of def..
in exponential smoothing models the value of the smoothing constant may be any number between .a -1 and 1b -5 and 5c 0
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