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Question: For each of the following situations, state whether the distribution of interest is a z distribution, a t distribution, or an F distribution. Explain your answer.
a. A city employee locates a U.S. Census report that includes the mean and standard deviation for income in the state of Wyoming and then takes a random sample of 100 residents of the city of Cheyenne. He wonders whether residents of Cheyenne earn more, on average, than Wyoming residents as a whole.
b. A researcher studies the effect of different contexts on work interruptions. Using discreet video cameras, she observes employees working in enclosed offices in the workplace, in open cubicles in the workplace, and in home offices.
c. An honors student wondered whether an education in statistics reduced the tendency to believe advertising that cited data. He compared social science majors who had taken statistics and social science majors who had not taken statistics with respect to their responses to an interactive advertising assessment.
normally distributed with a population mean of 2.5 and a population standard deviation of .5. Compute the following, showing all work: The percentage of students with GPA's above 3.0 is?
a. How many of the employees would you expect to have voted for President Bush? b. All of the employees indicated that they voted in the 2004 presidential election. Determine the probability of this assuming they followed the national trend. c. Ei..
A good number of the crimes in in Mesopotamia would be deliberated crimes nowadays.
Carry out a significance test for the hypothesis that the two tests have the same population mean. Give the P-value and state your conclusions.
Define the standard error of the mean. What happens to the standard error as the sample size increases? Explain
What about Versailles was important to Louis XIV? What was important about Versailles location?
many many snails have a one-mile race and the time it takes for them to finish is approximately normally distributed
Write a Lex program that examines the words in an ASCII file and lists the ten most frequently used words. Your program should ignore case and should ignore words that appear in a predefined "don't care" list.
a. How many different 3-course meals can be ordered from this menu? (Draw a tree diagram to help visualize this sample space; or use the counting rule to find the total number of meals.)
an investigator at a diet center is interested in the habits of clients entering his centers weight loss program. given
What is the median of the 20 sample means?- What is the range of the 20 sample means?- Display a box-plot of the 20 sample means.
Find the appropriate critical statistic for : A one tailed test in the positive direction with 15 observations with alpha equal to 0.001.
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