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Records over the past year show that 1 out of 315 loans made by Mammon Bank have defaulted. Find the probability that 5 or more out of 300 loans will default. Hint: Is it appropriate to use the Poisson approximation to the binomial distribution? (Round λ to 1 decimal place. Use 4 decimal places for your answer.)
Flying over the western states with mountainous terrain in a small aircraft is 40% riskier than flying over similar distances in flatter portions of the nation, according to a General Accounting Office study completed in response to a congressional request. The accident rate for small aircraft in the 11 mountainous western states is 3.0 accidents per 100,000 flight operations.a) Find the probability of no accidents in 100,000 flight operations. b) Find the probability of at least 8 accidents in 220,000 flight operations.
A marketing firm asked a random set of married and single men as to how much they were willing to spend for a vacation. At = .05, is a difference in the two amounts?
The mean of a normal probability distribution is 60; the standard deviation is 5.
Union Membership Nationwide 13.7% of employed wage and salary workers are union members (down from 20.1% in 1983). A random sample of 300 local wage and salary workers showed that 50 belonged to a union.
Determine the probability of randomly selecting 10 production employees on hot summer day and determining that none of them are absent?
a. Formulate the null and alternative hypotheses. b. Which statistical test would you use? Why?
Assume adults have IQ scores that are normally distributed with a mean of 105 and a standard dviation 20. Find the probability that a rondomly selected adult has an IQ betwwen 93 and 117.
The mean lifetime of electric light bulbs produced by a company has in the past been 1120 hours with a standard deviation of 125 hours. A sample of 20 bulbs revealed a standard deviation in the lifetimes of 150 hours.
0.8 of all college students like the idea of a new curriculum. If we select 87 students (ASSUME INDEPENDENCE), what is the Standard Deviation of the Probability Distribution that would list the number of students.
Students that studied for more than one hour received a c+ or above on the final. Use a .05 significance level to test the professor's claim.
Describe what assumptions must be met to use this test. Finally, where in your course project data set might you employ a paired t-Test?
Find out the suitable critical value(s) for this situation given a 0.05 significance level. Find out/compute the value of sample test statistic.
Find the z-score for each score in the population. Transfer the original population into a new population of N=5 scores with a mean of μ=60 and a standard deviation of σ=8
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