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In a random sample of 120 cheerleaders, 54 had suffered moderate to severe damage to their voices. With 90% confidence, what can we say about the maximum error if we use the sample proportion 54/120 = 0.45 as an estimate of the true proportion of cheerleaders who are afflicted in this way?
after practicing the coach still has to decide on the two alternate captains for the bronco hockey team. with 27
1.a simple random sample of 1000 americans found that 61 were satisfied with the service provided by the dealer from
The authors of the article "Predicting Professional Sports Game Outcomes from Intermediate Game Scores" (Chance, 1992: 18-22) used a chi-squared test to determine whether there was any merit to the idea that basketball games are not settled until ..
A sales manager wants to know if the sales productivity of her east region is greater than the sales productivity of her west region
one class of 40 students complain that they were harshly graded in the examination as l0 students received A or B ; 17 received a C ; and the rest received a D or lower. QUESTION: Is the class's complain about harsher grading justified? ( use a : 0..
calculate the difference between the daughters and mothers shoe sizes data given
If the population standard deviation is 18.8 days, find the 90% confidence interval for the average number of days worked by all employees who are paid through payroll departments.
In a random sample of 328 florida public school employees, 231 were female. write a 95% confidence interval for the proportion of the population of florida public school employees that are female.
an airline carriers 100 passengers and has doors with a height of 78 inch. height of men are normally distributed with
although the rules of probability are just basic facts about percents or proportions we need to be able to use the
Conduct all 6 steps of the appropriate statistic. Be sure to label all six steps. b. Calculate and interpret the effect size for this test. c. Calculate and interpret any post-hoc test if necessary.
a process for manufacturing an electronic component is 1 defective. a quality control plan is to select 100 items from
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