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A portion of a study by Wechsler (1958) reports that for 100 males taking the Wechsler Adult Intelligent Scale (WAIS), the sample mean and variance on picture completion are X¯ = 9.79 and s = 2.72. Test the hypothesis H0: μ ≥ 10.5 with α = .025.
martindate were tester which can compare two materials in sigle run, weights losses from seven runs. Examine these data by creating the 90% confidence interval for difference of means. Define your assumption.
Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000
The company can either settle out of court for $250,000 or go to court. If the company goes to court and loses, it must pay $825,000 plus $175,000 in court costs. If it wins in court the plaintiffs pay the court costs. Identify the states of natur..
a researcher wants to make a 95 confidence interval for the population proportion. what is the most conservative
with probability 0.4 stocks are worth 18 commercial bonds are worth 15 and government bonds are worth 9.with
Use the mean, median, and mode to make a statement about the difference in performance for city and highway driving.
x is a normally distributed random variable with a mean of 5.0. find the standard deviation of the distribution if
a population has a standard deviation of o 24.a. on average how much difference should exist between the population
it was found that in a sample of 90 teenage boys 70 of them have received speeding tickets. what is the 90 confidence
reginald brown an inspector from the department of weights and measures weights 15 eighteen ounce cereal boxes of corn
Is there enough evidence to support the consumer's conjecture at alpha=.10? 7.2 8.1 7.8 7.4 8.0 8.2 8.1 7.9
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
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