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A random sample of 100 items is selected from a population of size 350. What is the probability that the sample mean will exceed 200 if the population means is 195 and the population standard deviation equals 20? (Hint: Use the finite correction factor since the sample size is more than 5% of the population size).
The resident would be interested in joining this recreation center if it were built. Of these 35 indicated they would be interested in joining the recreation center. The population of interest is?
Survey of 16 tax returns reports families with incomes between $75,000 and 100,000 have on average $8,562 in Standard Deductions with the standard deviation of $1,800.
Compute the 99% confidence interval based on four data points that have a sample mean of 71.5 and a sample standard deviation of 16.6032
A comparison between products manufactured in China VS Mexico and their perceived quality to the US consumer based on manufacturing location.
A medical school claims that more than 32% of its students plan to go into general practice. It is found that among a random sample of 130 students, 46 of them plan to go into general practice.
Determine the upper control limit (UCL) and lower control limit (LCL) for an X-Bar chart if six samples of subgroup size 5 (n=5) were collected, and the mean of the sample averages is 4.7 and mean of the sample ranges is 0.35.
Normal distribution of 5 pounds per square inch, standard deviation of 1.5 pounds per square inch, what proportion have less that 3.17 pounds per square inch, at least 3.6 pounds, are between 5 and 5.5 and 95% will be contained between what two va..
Suppose that population variances from both kinds of digital cameras are equal, is there evidence of difference in mean battery life between two kinds of digital cameras.
To see if his belief is substantiated, conduct the test at a suitable significant level. State the assumptions made. see if his belief is substantiated, conduct the test at a suitable significant level. State the assumptions made.
A statistic practitioner working for Major League Baseball determined the probability that the hitter will be out on ground balls is .75. in a game where there are 20 ground balls, find the probability that all of them were out.
A hypothesis will test that two population means are equal. A sample of 10 with a standard deviation of 3 is selected from the first population and a sample of 15 with a standard deviation of 8 from the second population.
Is there enough evidence to reject the claim that the average cost of a home in both locations is the same? Use α = 0.01. Clearly mark each of the five steps in hypothesis testing.
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