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Question: Repeat the sampling process 20 times without pressing the Start Over button. Use Show Results to display the results of the 20 samples. Write down the results, or cut and paste them into a computer program.
a. What is the median of the 20 sample means?
b. What is the range of the 20 sample means?
c. Display a box-plot of the 20 sample means.
d. We know that the population has a mean height of 68 inches. Based on your results in parts (a), (b), and (c), discuss how useful the mean of a sample of size 10 is for estimating the population mean in this situation.
Ashley is a hard-core runner. She and all her friends prefer Powerade Ion4 to Gatorade. Explain why Ashley's experience is not good evidence that most young people prefer Powerade to Gatorade.
The average of a list of 12 numbers is 9 and the SD is equal to 3. If the numbers 6 and 12 are included with this list of numbers, what is the average and SD of the new list
Assume a normal distribution for pH values. If a random sample of 10 readings in a vat is taken and the mean pH is computed, find each of the following?
Design an experiment to test this conjecture. Be sure to identify the factors, levels, treatments, response variable, and the role of randomization.
Should the conclusions between the two tests consistent? Why or why not? If the conclusions are not consistent, which one would you agree with and why?
Compare and contrast the works of a representative artist of New Realism with a representative artist of Europe's Pop Art, highlighting the media, objects, and the possible intent of the artist in the specific work.
Below is the number of new cars sold at Sharkey in the last seven months and for the last eight months at Dave White. Do you agree with Mr. Sharkey? Use the .01 significance level."
Provide one example of how a confidence interval could be used in a business, sports, health care, political, etc. environment. Please identify a level of confidence in your example (.90, .95, .99).
probability of a sum that is even and less than 5
Construct a stem and leaf display. Indicate the shape of data displayed by the stem and leaf display.
At the 0.10 level of significance, test the null hypothesis that the population variances are equal. Would your conclusion be different if the test had been conducted at the 0.05 level? At the 0.02 level?
Use the given margin of error, confidence level, and population standard deviation (o) to find the minimum sample size required to estimate an unknown population means (u)
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