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A poll conducted in 1972 asked 1005 ?people, "During the past? year, about how many? books, either hardcover or? paperback, did you read either all or part of the way? through?" Results of the survey indicated that x = 19.2 books and s =20.2 books. Construct a 95?% confidence interval for the mean number of books read either all or part of during the preceding year. Interpret the interval. Also, Compare these results to a recent survey of 1005 people. The results of the survey indicated that x = 12.6 books and s =1 5.9 books. A 95?% confidence interval for this survey is (11.62, 13.58 ). Were people reading more in 1972 than they are? today?
Identify the null hypothesis and alternative hypotheses (you will need to write the null in your own words as this is not provided in most research reports)
Create a logarithm data set using this procedure; that is, replace the 16 zero values of PCB126 by 0.0026 before taking logarithms
a random sample of 22 cans from y store had a mean of 12.03 and a standard deviation of 3.86. a random sample of 25
1. What is a telescoping rod cylinder? When would it normally be used?
Compute simple main effect tests for the type of adult factor at each level of the consequences factor. Use Tukey's HSD to analyze the significant.
In using a contingency table, what assumption allows us to compute the expected frequency for a cell as we do?
suppose that a category of world class runners are known to run a marathon 26 miles in an average of 142 minutes with a
It was reported that 20 readers responded and 87% said "no" whiles 13% said "yes". Identify four major flaws of the situation. Explain why you chose them.
Define the variable - the weight in pounds - it is a dependent variable. Find the mean, median, mode, variance, and standard deviation for your data.
That is, find the expected value of X-Y . What is the standard deviation of the amount left in the box?
The coupon is paid in two semiannual payments. Market rates on bonds of similar risk and maturity are now 7%. The bond should sell for:
The average for the test is a 1700 and the population's standard deviation is 50. what percentile rank of students is Logan in based on her SAT score.
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