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Use the appropriate normal distribution to approximate the resulting binomial distribution.
The manager of Madison Finance Company has estimated that, because of a recession year, 3% of its 400 loan accounts will be delinquent. If the manager's estimate is correct, what is the probability that 20 or more of the accounts will be delinquent? (Round your answer to four decimal places.)
a large city claims that it provides free lunch to more than 30 of its elementary school students. a researcher selects
explain why we use the notation p lt .05 in the formal test of the hypothesis when there is a significant difference
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
a biology professor claimed that the proportions of grades in his classes are the same. a sample of 100 students showed
The 2010 Chevrolet Camaro with an eight-cylinder engine and automatic transmission has a combined gas mileage of 19 mpg. What percent of all vehicles have better gas mileage than the Camaro?
Suppose the organizers of the study are reconsidering their sample-size estimate. How many participants should be enrolled in each of the active and control intervention groups to achieve 80% power if a two-sided test is used with α = .05
let y1 y2 ... yn denote a random sample from uniform distribution on the interval 0 theta.let ybar sample mean max
In an early study, researchers at an Ivy University found that 33% of the freshmen had received at least one A in their first semester.
Analysis of variance (ANOVA) is used to determine if there is a difference between the means of different populations. This is an example from a student in Prescott Arizona.
question 1 i. we are conducting a two tailed hypothesis test at a 1 significance level to test that the mean of a
According to an article, 19% of the entire US population have high-speed access to the Internet. Random samples of size 200 are selected from the US population.
How does this probability compare to the probability that the word will be received correctly if we didn't use check bits, in which case all 4 bits would have to be received correctly for the word to be correct?
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