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A researcher claims the proportion of auto accidents that involve teenage drivers is less than20%. ABC Insurance Company checks police records on 200 randomly selected auto accidents and notes that teenagers were at the wheel in 32 of them. Assume the company wants to use a 0.05 significance level to test the researcher's claim.
(a) Identify the null hypothesis and the alternative hypothesis.
(b) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit.
(c) Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, will receive no credit.
(d) Is there sufficient evidence to support the researcher's claim that the proportion of auto accidents that involve teenage drivers is less than 20%? Explain
For normal random variables, the probability of being within one standard deviation of the mean is .68. That is, P(µ - σ ≤ X ≤ µ + σ) = .68 if X has a normal distribution. For nonnormal distributions, is it safe to assume that this probability is ..
Find out the value of test statistic utilizing one sample proportion testing. Use the subsequent information for the below questions.
Write a short report summarizing your results and conclusions. Be sure to include numerical and graphical summaries of what you have found.
The random number generator on calculators randomly generates a number between 0 and 1. The random variable X, the number generated, follows a Uniform Probability Distribution. What is the probability of generating a number between 0 and 0.2?
The sample variance was s^2=16.0. does the sample show sufficient reason to conclude that the population standard deviation is not equal to 3 at the 0.05 level of significance? use the p-value method.
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A regional manager implements a policy change for stores in his region to begin greeting customers whenever they are standing within a 3 metre distance in the store. He compares mean daily purchase numbers over one month from pre-change to post-ch..
For a randomly selected group of 4 adult workers, what is the probability that no more than 3 of them drink coffee at least occasionally while on the job?
What is the probability that none are a commercial success?
according to recent estimates only 45 of people in africa have access to safe drinking water this being the major
we have all heard of old faithful geyser in yellowstone national park. however there is another less famous old
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