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Question: Repeat the sampling process 50 times without pressing the Start Over button. Use Show Results to display the results of the 50 samples. Cut and paste the results into a computer program capable of creating a histogram, or write them down.
a. Display a histogram of the 50 means of the chosen samples.
b. Describe the histogram in part (a), including shape, center, and spread.
c. Display a histogram of the 50 values of "percent female."
d. Describe the histogram in part (c).
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
the researchers found a significant difference between the two groups control and treatment for change in mobility of
Random sample of 85 group leaders, spent 6.5 years on job before being promoted standard deviation of sample was 1.7 years create 95 percent confience interval.
a multiple-choice exam consists of 16 questions each with five alternatives. a student needs to answer at least 12 of
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A coin that comes up heads with probability p is ?ipped n consecutive times. What is the probability that starting with the ?rst ?ip there are always more heads than tails that have appeared?
suppose that you want to test for a difference in proportion between two groups. group 1 has 80 respondents and 40 of
Suppose we conduct an ANOVA test of four treatment means and reject the null hypothesis. Construction of a confidence interval for the difference between the first and second sample mean revealed the interval to be 10 plus or minus 12. We conclude
If the M&M s are packaged in the stated proportions, how many of each color should the author have expected to get in his bag?
Helping smokers quit by race. Patten and colleagues (2008) stated that "among nonsmokers who indicated they were close to a smoker.
the owners of a two-person business make their decisions independently of each other and then compare their decisions.
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