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Balances owed by customers holding MasterCard. The standard population deviation is estimated to be $300. If a 98% confidence interval is used and the maximum allowable error is $80, how many cardholders should be sampled?
What is the difference between Einstein's IQ and the mean? How many standard deviations is that [the difference found in part (a)]?
if x is a binomial random variable where n100 and p.1 find the probability that x is less than or equal to 12 using the
Calculate the regression line for father's score predicting daughters score - Draw a scattergram, and a freehand regression line.
Is there enough evidence to support the claim at level of significance 0.05, that there was a significant difference in change of attitude?
Find the minimum score the instructor can set so that the probability that a student will pass just by guessing is 20% or less.
The test has a reliability of .87 and a standard deviation of 5. Joe scored a 57 on the test and Jill scored a 62. Is Jill clearly superior to Joe? Explain your answer.
the salespeople at quality motor bikes sell up to 5 bikes a month. the probability distribution is as follows in the
Reconsider the first example in Sec. 5.2. Based on the ambiguous depth indication and the utilities, the engineer used a long pile even though the shallow
What is the t-test statistic? Top Shelf Sales Volume 23 35 50 68 32 Bottom Shelf Sales Volume 55 70 72 51 63
a random sample of 50 price changes is selected from the many listed for a large super- market during a reporting
What is the probability of obtaining a score equal to or greater than 90?
We took a random sample of 25 customers and found a mean waiting time of 22 minutes with a standard deviation of 6 minutes. We want to construct a 99% confidence interval for the population mean of such waiting times.
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