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The Acme Candy Company claims that 60% of the jawbreakers it produces weigh more than .4 ounces. Suppose that 800 jawbreakers are selected at random from the production lines. Would it be unusual for this sample of 800 to contain 406 jawbreakers that weigh more than .4 ounces?
Please perform a hypothesis test using a .05 significance level on the following information. Next please perform a regression analysis as well as providing a scattered diagram.
Find out 90% confidence interval for mean grade of all the students in the class.
Medical tests were conducted to learn about drug-resistant tuberculosis. Of 142 cases tested in NJ, 9 were found to be drug-resistant. Of 268 cases tested in Tx, 5 were found to be drug-resistant.
Describe each of the following types of designs, explain its logic, and why the design does or does not address the selection threats of Trochim and Donnelly (2006):
What is the probability of randomly selecting a sample of 30 scores which has a mean attention span equal to or greater than 17 minutes.
Which of the following conditions must be met to conduct a test for the difference in two sample means? Suppose we test the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what is our decision?
Estimate the true mean price for this particular model with 95% confidence?
Conduct the hypothesis test and provide the test statistic, critical value and/or P- value and state the conclusion.
Determine the probably of selecting a female or an accounting major? Which rule of addition did you apply?
Two new york designs are under consideration for possible adoption in an assembly plant. A time study is conducted with 10 workers using design 1, and 12 workers using design 2. The means and standard deviation of their assembly times in minutes a..
Given the binomial distribution with n = 23 and p = 0.79, would the normal distribution provide the reasonable approximation? Why or why not?
What was the purpose of calculating a Cohen's d? When is a Cohen's d calculated? Interpret d=.90. What does it mean in this example?
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