O Home Students XModule Three: Beyond a Best GX (467) MAT-240: Module Three x Do
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O Home Students XModule Three: Beyond a Best GX (467) MAT-240: Module Three x Do Homework - Zachery Hanna+ > C O https:// tudent PlayerHome vork aspx?homeworkid-4951561 53&question de 18 flushed-false&cid-51373 &back-DoAssign v mathd com . Apps e Chrome Web Store New Tab MAT-240-T1625 Applied Statistics 18EW1 Zachery Hanna | 9/23/18 8:46 PM Homework: 3-2 MyStatLab: Module Three Problem Set Save Score: 0 of 5 pts 12 of 14 (11 complete) HW Score: 69.38%, 45.1 of 65 pts 9.2.32 Question Help A poll conducted in 1976 asked 1005 people, "During the past year, about how many books, either hardoover or paperback, did you read either all or part of the way x 18.7 books and s 19 7 books (a) Construct a 99% confidence interval for the mean number of books read either all or part of duringthe preceding year Interpret the b) Compare these results to a recent survey of 1005 people The results of the survey indicated that -13.3 books and s 16.5 interval more in 1976 than they are today? Click the icon to view the table of areas under the t-distribution (a) The 99% confidence interval for 1976 is ( (Use ascending order. Round to two decimal places as needed.) Enter your answer in the edit fields and then click Check Answer Check Answer 846 PM 23/2018 e a Type here to searchExplanation / Answer
a)
Confidence Intervalt
Two Sided Confidence Interval for 99%
Here, n = 1005 , xbar = 18.7 and s = 19.7
z-value is 2.5758
Standard Error, SE = s/sqrt(n)
SE = 19.7/sqrt(1005)
SE = 0.6214
Margin of Error, ME = z*SE
ME = 2.5758*0.6214
ME = 1.6006
CI = (xbar - ME, xbar + ME)
CI = (18.7 - 1.6006 , 18.7 + 1.6006)
CI = (17.0994 , 20.3006)
b)
Yes, people were reading more in 1976
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