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Air-America has a policy of booking as many as 14 people on an airplane that can seat only 12. (Past studies have revealed that only 92% of the booked passengers actually arrive for the flight.) Usi
The credit score of a 35 applying for a mortgage is normally distributed with a mean score of 600 and a standard deviation of 100. What credit score defines the top five percent of scores. Within wha
What is the difference between McNemar's Test and the chi-square test for 2X2 tables? When do we use each test?
If you randomly select one butterfly from the table above, what is the probability of selecting a red butterfly or one collected in spring? Explain the addition rule
The probability that an egg is broken is 0.15. Larry bought a box of dozen eggs; find the probability that at most 2 eggs are broken?
A group of businessmen consist of p(d)=40 % Democrats and p(d')= 60% Republicans. If p(s/d)=30 % of the Democrats smoke cigars, and p(s/d')=50% of Republicans smoke cigars also. What is the probabil
Discuss what happens to the width of the confidence interval as the confidence level is increased. Does this seem reasonable? Explain.
the number in each group who had at least one complaint are as follows: 0,2,1,0,0,1,3,0,1,2,2,0. Develop upper and lower control limits (99.7%) for the proportion of students with complaints.
estimate the proportion of all Kaplan students who are male using a 90% level of confidence. There are 42 males out of 240 students in the sample.
A sample of 20 pieces of work resulted in the following number of blemishes on each piece: 0,2,1,0,0,3,2,0,4,1,2,0,0,1,2,1,0,0,0,1. Develop upper and lower control limits for the number of blemishes
what is the probability that they all have blue eyes? Would it be unusual to randomly select four people and find that they all have blue eyes? Why or why not?
The overall average for the samples is 17 ounces. The range is only 0.5 ounce. Determine the upper and lower control-chart limits for averages for the boxes of cereal.
The promoters pay the insurance premium but take on no added risk at the insurance company will make the large payout in the unlikely event that a contestant wins. To see how it works suppose that t
Let {Xn : n >=1} be a sequence of positive independent random variables with E(Xn) = c 2 (0; 1) for each n. Let Yn = X1X2...Xn, the product of the Xi's. Use Markov's inequality to prove that Yn ~
A simple random sample of SAT scores is obtained, and the population has a distribution that is approximately normal. The sample statistics are n =41, sample mean (x bar) =1503, Sample standard devi
Ho: U>= 220 and H1: U<220. In conducting a hypothesis test using a .03 significance level what will be the value of your critical value?
On a test, a sample of 5 students has a mean score of 78. The scores of four students of them are: 87, 81, 76, 53. Find the test score of the fifth student and standard deviation of this sample.
Specifically, how does each variable affect demand? How do the variables influence each other? What limitations might this model have? How can it be improved?.
The range is only 0.5 ounce. Determine the upper and lower control-chart limits for averages for the boxes of cereal.
Based on the use of utility measures, which program would you recommend? Is the manager a risk taker or risk avoider?
A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances.
In a report on high school graduation, it was stated that 85% of high school students graduate. Suppose 3 high school students are randomly selected from different schools. What is the probability t
If 15 golfers have checked in using this process, what is the probability there will be at least 4 no-shows among them?
What test can be used to assess if mean blood pressure has changed significantly in the SMI group? Perform the test and report its result. The results for the control group (n=320) at the end of the
Find the probability that a randomly selected customer who pays by check spends more than $114 on groceries.