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A researcher believes that about 74% of the seeds planted with the aid of a new chemical fertilizer will germinate. He chooses a random sample of 200 seeds and plants them with the aid of the fertilizer. Assuming his belief to be true, approximate the probability that at least 148 of the 200 seeds will germinate. Use the normal approximation to the binomial with a correction for continuity.
Round your answer to at least three decimal places. Do not round any intermediate steps.
consider the series-parallel networks depicted below. each system comprises four components. the time-to-failure for
A nurse at a local hospital is estimating the weight of infants. how large a sample must she select if she desires to be 95% confident that the true mean is within 3 ounces of the sample mean?
Write a short report describing the distribution of the visits to this web site. Include some discussion of why this distribution might have that particular shape.
What is the relationship between a confidence interval and a single sample, two-tailed hypothesis test? How are they the same? How are they different?
An elementary school in Logan employs 15 teachers; 11 are women and 4 are men. Two teachers are selected at random to meet the governor and attend a reception in SLC. Answer each part separately. What is the probability that both are women? What is..
a national caterer determined that 87 of the people who sampled their food said that it was delicious. a random sample
use the given information to find the p value. also use a 0.05 significance level and state the conclusion about the
"A major retail chain uses survey data to estimate the mean age of customers. A 95% confidence interval for the mean age of all its customers is found to be (21.7, 46.5) using a sample size of 135"
suppose the probability distribution for x 5 number of jobs held during the past year for students at a school is as
An experimental study is designed to test the potency of a drug on 16 calves. Previous studies have shown that a 10-mg dose of the drug is lethal 7% of the time within the first 7 hours.
If it is assumed that the probability distribution for the number of room rentals forms a normal distribution, what is the probability that on a given night?
a car enthusiast hypothesized that the average horsepower of 8 cylinder cars was less than 475. a random sample of 15
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