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12% of those eligible for jury duty are left handed. Among 250 people selected for jury duty, 25 (0r 10%) are lefties. find the probability of getting at most 25 lefties assuming that they are chosen with a process designed to yield a 12% rate of lefties.
Mention your decision regarding the null hypothesis. If H 0 rejected can we conclude that treatment 2 and treatment 3 differ? Use 95 percent level of confidence.
Let μ be the hourly wage (excluding tips) for workers who provide hotel room service in a large city. A random sample of a number (more than 30) of such workers yielded a 95% confidence interval for μ of $8.46 to $9.86 using the normal distributio..
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a 1 or 2 tail test?
Mr. James McWhinney, President of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales.
The probability that student pilot passes the written test for a private pilot's license is 0.7. Find the probability that the student will pass the test: (a) on the third attempt (b) before the fourth attempt.
Using the 0.05 level of significance, is there evidence that the population mean is above $170?
The bottom 1.5% of students must go to summer school. What is the minimum score you would need to stay out of this group?
Salaries upon graduating than are graduates of other programs. Describe a statistical experiment that could help test your belief.
What is the probability that at most five cases of E. coli per 100,000 are reported in California this year?
When is a factorial ANOVA used? Give Example. When is a chi square test appropriate? Give Example. When does linear regression versus multiple regression apply? Give Example.
A market research company surveyed consumers to determine their ranked preferences of energy drinks among the brands Monster, Red Bull, and Rockstar.
Prove that if R is commutative ring and N=(a1,a2,..am) where each ai is a nilpotent element, then N is a nilpotent ideal, i.e N^n=0 for some positive integer n.
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