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1. The mean of any distribution has a z score equal to what value?
2. What conclusion can you reach about ∑z?
3. Under what conditions would you prefer that your personal z score be negative rather than positive?
Suppose it is desired to estimate the population mean number of miles with a margin of error of ± 2 miles at 95% confidence. Do the data provide this desired level of precision? What action, if any, would you recommend be taken?
A test on zoology is to be given next week. Suppose 75 percent of the students study for the test and 25 percent do not. If a student studies for the exam, the probability that he or she will pass is 0.90. If the student does not study, the pro..
Find the expected frequency for the number of days in which there was exactly one application. Determine the expected frequency for the other days in a similar manner.
Sample data are reported for 50 employees of small companies, 75 employees of medium companies, and 100 employees of large companies.
Find all the values of x in the interval [0, 4Π] which satisfy the equation - Find the slope and equation of the line joining A and B.
in a sample of discharge of suspended solids from a phosphate mine it was noted that the mean daily discharge was 27
In a hospital, a sample of 8 weeks was selected, and it was found that an average of 438 patients was treated in the emergency room each week. The standard deviation was 16. Find the 99% confidence interval of the true mean. Assume the variable is..
Is positioning helpful to not-for-profit organizations? If so, how should a charity select and implement a positioning strategy?
Why and how did the USA get involved in the war in Vietnam? What was the Gulf of Tonkin Resolution? Why did President Lyndon Johnson propose it and why did Congress pass it? Do you think the USA should have sent troops to Vietnam? Why or why not?
below is a table of observed values of sample comparing peoples ages to their political affiliation. construct the
consider taking samples of size 25 from a population with proportion 0.65.a find the mean of the distribution of sample
Calculate the median from the following data:Mid values : 115,125,135,145,155,165,175,185,195frequency : 6,25,48,72,116,60,38,22,3.
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