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25 relativell u s worry about his mortality so they randomly select calculated sample mean age had died and collected the age when they died. The instructor when they died to be 67.5 years with a sample standard deviation of 15 years 28. (4 pointe) What is the point of estimate? a) 25 b) There is no point of estimate since we c) 67.5 only use that for proportional data set. d) 15 29, (4 points) Find the margin of error for a 90% confidence interval. c) 15 d) 5.13 b) 5.124 (4 points) Find the 90% confidence interval. (64.5,70.5) (62.367, 72.633) e) (52.5, 82.5) d) (62.376, 72.624)
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