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Suppose that a person who has recently helped start a band for the first time is randonly selected. The probability that the band will break up within 7 months is 0.5. Suppose we follow the bands (56 people) for 7 months and record the number of people who band broke up. Why is the binomial model inappropriate for finding the probability that at least 14 of these 56 people will no longer be in that band within 7 months? List all the binomial conditions that are not met.
Select all that apply.
A. The trials are independent.
B. The only two outcomes are success and failure
C. The probability of success, p, is the same at each trial.
D. There is a fixed number of trials: n.
Shoppers enter Hamilton Place Mall at an average of 120 per hour, and the number and shoppers is Poisson distributed. What is the probability that at least 5 shoppers will enter the mall between 5:00 and 5:05 p.m.?
Suppose that you draw a random sample of 27 cans. Find the probability that the mean weight of the sample is less than 6.19 ounces.
Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10.
An economic researcher would like to know whether he can reject the null hypothesis at the 0.10 level, that no more than 20% of the households in Pennsylvania make more than $70,000 per year.
suppose x the number of flaws in a roll of polyethylene insulated cable follows a poisson process where lambda is 1.1
What is the difference between a point estimate and an interval estimate? How would you calculate a confidence interval with a z test?
A quality control analyst wants to examine thermometers that give readings in the bottom 4%. Find the reading that separates the bottom 4% from the others.
A southern state has an unemployment rate of 6%. The state conducts monthly surveys in order to track the unemployment rate. In a recent month, a random sample of 700 people showed that 35 were unemployed.
Calculate a regression that examines whether or not you can predict if a student wants a lecturer to be extroverted using the student's extroversion score.
the wall thickness of 20 glass 2-liter bottles was measured by a quality control engineer. the sample mean was xbar4.05
Find the probability that a randomly selected teacher earns and what sample size is necessary to double the standard error of the mean and what sample size is needed to cut the standard error of the mean in half?
Using realistic numbers for values of degrees of freedom, sample size, F-ratio, confidence interval and post hoc results; report hypothetical results in a few sentences using APA format.
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