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A bank wishes to estimate the mean credit card balance owed by its customers. The population standard deviation is estimated to be $313. If a 98 percent confidence interval is used and an interval of $76 is desired, how many customers should be sampled?
a sample of n 9 has a mean of m 72 with ss 162. use the sample to make a point estimate of u and to construct the 90
Consumer Reports published an article on some sport-utility vehicles they had tested recently. They reported some basic information about each of the vehicles and the results of some tests conducted by their staff.
an experimenter wants to conduct a hypothesis test on a claim that there was no difference between two population
edward and his friends cannot go outside when it is sunny because they are vampires. edwards hometown forks washington
Twenty single men were chosen at random and were asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that seven (7) of the men say NO?
a confidence interval estimate for the population mean is given to be 36254476. if the standard deviation is 17.803
a clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. two
the national study of the changing workforce conducted an extensive survey of 2958 wage and salaried workers on issues
The Complaints Department of a popular used car dealer receives most complaints about the electrical system, particularly the starter.
A sample of 49 pieces of cloth reveals a sample mean breaking strength of 69.1 pounds. State the null and alternative hypotheses.
A clothing manufacturer tests an SRS of 3 specimens of each fabric. (a) What is the probability that the mean breaking strength of the 3 untreated specimens exceeds 49 pounds.
Identify what you think is the best measure of variability to use for your example and explain why you believe it to be better than the others.
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