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Why is the population shape of concern when estimating a mean? What does sample size have to do with it? Explain
Define the standard error of the mean. What happens to the standard error as the sample size increases? Explain
Single group post-test and internal validity threats - Answer the question either by writing the design name or by describing the design using standard notation
At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and the standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. What is the possibility that th..
At the .05 significance level, can we conclude that there is a difference in their mean times?
Obtain a test statistic and p-value. Interpret the results at = .01.
To test is there any significant difference among two proportions. The Damon family owns a large grape vineyard in western New York along Lake Erie.
What is the probability that the debt for a borrower with good credit is more than $18,000?
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
Categorize as simple, random, sample, stratified/systematic sample, cluster/convenience sample. List discharged hotel customers, divide them day their length of stay, and draw simple random samples from each group.
use the following sample data to test whether the GPA are different at the 0.05 level of significance.
The men took an average of 20.5 hours per year of personal time with a standard deviation of 2.75 hours. What is the pooled estimate of the variance? Round to three decimal places.
If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:
Test hypothesis that people in State A are more depressed than U.S. population. Illustrate all of your hypothesis steps. (Use alpha = .01.)
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