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An article in the 1993 volume of the Transactions of the American Fisheries Society reports the results of a study to investigate the mercury contamination in largemouth bass. A sample of fish was selected from 53 Florida lakes and mercury concentration in the muscle tissue was measured (ppm). The mean concentration of this sample was .5250 while the sample standard deviation was .3486. Indicate both approximate 95% and 99% confidence intervals for ?
Iif the person scores in the upper 6 percent of the distribution. What is the lowest score a college graduate must earn to qualify for a responsible position?
Seven employees were included from Area A, 9 from Area B and 12 from Area C. The test statistic was computed to be 4.91. What can we conclude at the 0.05 level?
Participants is approximately a normal distribution with a mean of 68 years and a standard deviation for 3.5 years. What proportion of the plan recipents die before they reach the standard retirement age of 65.
He (given that) the true proportion of perfect condition items is only 80% what is the probability that the lot will not be shipped?
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
Suppose you, as manager of Tennessee Grilled Pork, will submit proposals for a small business loan and a city business grant to help fund the building of the new location you submitted to the management teams.
The number of widgets produced by 9 employees in an eight hour shift is recorded as: 135, 120, 116, 119, 121, 125, 135, 131, 123. What is the median of the number of widgets produced presented above?
We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
Assume the population standard deviation (s) is 0.5 and the sample size (n) is 100. Calculate the values for alpha, a type I error and beta, a type II error. (To calculate Beta, consider a mean that is 1 standard error away from the lower end valu..
Calculate (a) MAD, (b) MSE, and (c) MAPE for the following forecast versus actual sales figures.
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