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The average weekly earnings of the plumbers in a city is [Mu=$750] with a standard deviation of [s=$40]. Assume that we select a random sample of [n=64 plumbers], what is the probability that the sample mean [x] will be greater than $740 or greater than $755?a. 0.0228b. 0.1587c. 0.3413d. 0.4772e. None of the above answers is correct.
Brief literature review of factors influencing sales - investigate the relationship between advertising expenditure and sales.
Each of the following proportions is based on survey responses. For each proportion, use the ±2 rule of thumb to determine the 95 percent confidence interval. When asked if they are satisfied with their financial situation, .29 said "very satisfied" ..
At a recent meeting of educational researchers comparison were made between the type of college freshmen attend and the numbers who drop out. A random sample of freshmen show the following results: (keep two decimals in calculating expected fre..
Wiley Publications has determined that out of a sample of 5,826 of its publications for 2012, 4,222 of them had been pirated online in some form. What is the estimate of the population proportion? What is the standard error of this estimate?
The focus of the research will be in restaurant and coffee field, may you write this in the problem statement and must write it in the scope of the study.
What is the conditional probability that a student likes gospel music if we know that he or she likes country music?
Find the marginal density of D2
A package contains 18 candy canes, 13 of which are cracked. If 4 are selected, find the probability of getting exactly four cracked candy canes.
advertising for this variable each student must fill in the table with whatever random values each student wants.
An independent-measures study produces t(21)=3.00, p
Davids ipod has about 10000 songs.the distribution of the play times for these songs is heavily skewed to the right with mean of 225 seconds and a standard deviation of 60 seconds. Suppose we choose an srs of 10 songs from this population and ..
A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly selected adults are given an IQ tesst, what is the probability that the sample mean scores will be between 85 and 125 points?
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