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A computer manufacturer estimates that its line of mini- computers has, on average, 8.4 days of downtime per year. To test this claim, a researcher contacts seven companies that own one of these computers and is allowed to access company computer records. It is determined that, for the sample, the average number of downtime days is 5.6, with a sample standard deviation of 1.3 days. proportion of MBAs expect stock options? Let a = .05. If the proportion really is .50, what is the probability of committing a Type II error?
Find the probability that the mean weight of those loads is less than 42.00 tons. Assume that the variable is normally distributed.
the us food and drug administration fda recommends that adults ingest less than 2.4 g of sodium per day.if a drinking
The following table summarizes data between money spent on gambling and winnings for Robert.
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
For the following situation, assume the random variable is normally distributed and use a normal distribution or a t-distribution to construct a 90% confidence interval for the population mean. If convenient, use technology to construct the confid..
To compare the effectiveness of two treatments 1 and 2 for a particular disease. Patients were separated in 2 treatment groups. A patient in group 1 received treatment 1 and patients in group 2 received treatment 2.
you plan to conduct a survey to find what proportion of the workforce has two or more jobs. you decide on the 99
How should the candidate purchase the five commercials to maximize the estimated number of additional voters?
Standard deviations differ, and speculate on the possible meaning of these differences, presuming that they are representative of U.S. governors and large corporations' CEOs in general.
A random sample of 300 beer drinkers is selected and each member of the sample is asked to choose between two brands of beers: Brand A and Brand B. The results are that 165 prefer Brand A and 135 prefer Brand B.
A customer with a trade-in offers the store a $260 cash price for the cabinet. Is that a better deal (for the customer) than the store is offering? On Mary's 16th birthday, her parents invest on her behalf an amount of $5,000 into an account that ..
1- as the confidence level increases while me stays the same does the required sample size increase decrease or stays
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