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Facebook friends. Facebook data indicate that 50% of Facebook users have 100 or more friends, and that the average friend count of users is 190. What do these findings suggest about the shape of the distribution of number of friends of Facebook users?
You want to show an increase in buying and selling of single-family homes this year when compared with last year's rate.
Using the appropriate statistical procedure on the SPSS, test the between group means for a significant difference.
suppose that the drying time for a certain type of paint under specified test conditions is known to be normally
describe the sign test. what types of hypotheses is it used to test? what is the underlying
Better parking A local high school makes a change that should improve student satisfaction with the parking situation.
a young boy is a budding entrepreneur and decides to start his career by selling sandwiches in an office building. he
a resercher wishes to estimate with 90 confidence the proportion of adults who have high-speed internet access. her
Polly Pollster wants to estimate the proportion of voters in the state of Washington that are in favor of an antitax initiative. She will be using a random sam ple (with replacement) of 1,000 voters, and she will record their preference regarding..
What about drawing a random sample only from cell phone exchanges? Discuss the advantages and disadvantages of such a sampling method compared with surveying randomly generated telephone numbers from non - cell phone exchanges.
Universities and colleges do not like to admit students who do not perform well. It is expensive and unpleasant for both the student and the school. Since you work in the Department of Education and are a trained statistician, your supervisor has ask..
Is the large-sample confidence interval for the difference in two proportions appropriate to use in this setting? Explain your answer.
You have made an investment that pays you $2,000 at the end of the first year, and then decreases by 9% each year for 4 more years (5years total). What is the FUTURE worth of this investment? (interest rate= 9%).
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