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Suppose that a random sample of 41 state college students is asked to measure the length of their right foot in centimeters. A 95% confidence interval for the mean foot length for students at this university turns out to be (21.709,25.091). Which of the following is true?
A-Same width but less confident
B-Cannot be determined
C-Wider since less confident
D-Narrower since less confident
a certain species of tree has an average life span of 130 ears. a researcher has notice a large number of trees of this
In recent years, the interest rate on home mortgages has declined to less than 6.0 percent. However, according to a study by the Federal Reserve Board
Then turn up cards from the top until the first ace appears. What is the expected value of the number of cards required to produce the first ace?
answers the following questions using the anova source table below. the table depicts a two-way anova in which gender
In addition, explain why it is important to ensure that your participants understand fully the extent of the research before you begin.
you make five measurements of a particular wavelength and you find you have some random noise. your measurements are
The foreman at a large plant estimates defective parts about 1.5% of the time. If the plant produces 25,000 parts in a week, what is the standard deviation (to the nearest tenth) for the number of defective parts?
At a probability of type 1 error of 0.05, test the claim that the assistant professors earn more than $42000 per year. the standard deviation of the population is $5230.
consider two random variables x and y. suppose that the variance of x is 20 that this of y is 10 and that the
Explain a Type I error for this situation. Explain a Type II error for this situation.
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
U.S Census data show that 14% of the consumer population is 18 to 24 years old. Given the consumer is 18 to 24 years old, what is the probability that the consumer use a plastic card?
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