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In a hypothesis test with hypotheses H0:μ=24 and H1:μ≠24 , a random sample of 33 elements selected from the population produced a mean of 26.1. Assume that σ=4.7, and that the test is to be made at the 10% significance level.
What are the critical values of z?
What is the value of the test statistic, z, rounded to three decimal places?
What is the p-value for this hypothesis test, rounded to four decimal places?
Child care and aggression A study of child care enrolled 1364 infants and followed them through their sixth year in school.
The distance from the seat back to the front of the knees of seated adult males is normally distributed with mean 23.8 inches and standard deviation 1.22.
Popcorn kernels take between 100 and 200 seconds to pop. What sample size (number of kernels) would be needed to estimate the true mean seconds to pop with and error of 5 seconds and 95% confidence level?
Does eating too much sugar increase children's activity level?- Do continuous reinforcement schedules result in faster learning than intermittent reinforcement schedules?
You are stopped at the checkpoint and, of course, have not been drinking. What s the probability that you are detained for further testing?
A developer who specializes in summer cottage properties is considering purchasing a large tract of land adjoining a lake. The current owner of the tract has already subdivided the land into separate building lots and has prepared the lots by remo..
In a group of 6 computer programmers, what is the probability that none are introverts? What is the probability that 4 or more are introverts?
If we select, at random, a small business owned by a non-Hispanic white, what is the probability that it is a male-owned firm?
Johnny Comlatey has 53% of votes among all voters in two-way race. Probability that newspaper's poll of 380 voters would forecast Johnny Comlatey's opponent the winner is?
Modeling product sales. A company wants to model the total weekly sales, y, of its product as a function of the variables packaging and location.
What would be the estimated total enrollment for an HMO firm that administered 20 plans? Source: The Wall Street Journal Almanac 1999, p. 565.
What type of test is needed to analyze the data? What is the hypotheses (including the symbols used to state the hypothesis)?
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