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Florida Department of Labor and Employment Security reported state mean annual wage was $26,133 (Naples Daily News, Feb. 13, 1999). Hypothesis test of wages by county can be performed to see whether mean annual wage for particular county diers from state mean. Sample of 550 individuals from Collier County illsutrated sample mean annual wage of $25,457. Suppose that = $7600, is there adequate evidence to conclude that mean annual wage of people from this county is signicantly dierent than state mean?
The State Department of education requires local school districts to keep records on all students within their district. Determine if the following items are categorical or numeric variables.
Bay Area University enrolls MBA students in three cohort programs: Weeknight, Saturday, and Distance. Dean Ed Epstein wants to know if there is a difference in the average of the students in the three programs.
To maximize Andre's probability of landing on the net, how far away from the cannon should he position the nearest edge of the net?
Chi-square test for independence of attributes - Describe why a x 2 test of the resulting contingency table is appropriate for such an investigation.
What decision should be made regarding the null hypothesis?
Assume that standard deviation is $3,204 and that 36 four-year institutions are arbitarily selected. Determine the probability that sample mean cost for these 36 schools is less than $25,000.
Replacement times for CD players are normally distributed with mean of 7.1 years and a standard deviation of 1.4 years (based on data from "Getting Things Fixed," Consumer Reports). Find the probability that a randomly selected CD player will have..
A side effect of a certain anesthetic used in surgery is the hiccups, which occurs in about 10 percent of the cases. If three patients are scheduled for surgery today and are to be administered this anesthetic, compute the probability that:
A population is Normally distributed and has a σ = 24. Samples of size 25 have a sample mean of 100. Find the 90% confidence interval for the population mean.
Develop a p chart with 3-sigma control limits and evaluate whether the process is in statistical control
What is the probability of getting someone who is in the 23-30 age brackets or whom smokes?
Joe has started an iphone booth in the mall. His francise booth and other startup costs total $82,000. Joe expects to pay $240 per iphone unit and sell them for $390 each. Joe needs to reach a 10% profit margin.
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