Question

In a survey conducted by the Gallup organization,1100 adultAmericans were asked how many hours they worked in the previous week. Based on the results, a 95% confidence interval for mean number of hours worked was lower bound: 42.7 and upper bound: 44.5.Which of the following represents a reasonable interpretation of the result? For those that are not reasonable, explain the flaw.
(a) There is a 95% probability the mean number of hours worked by adult Americans in the previous week was between 42.7 hours and 44.5 hours.
(b) We are 95% confident that the mean number of hours worked by adult Americans in the previous week was between 42.7 hours and 44.5 hours.
(c) 95% of adultAmericans worked between 42.7 hours and 44.5 hours last week.
(d) We are 95% confident that the mean number of hours worked by adults in Idaho in the previous week was between 42.7 hours and 44.5 hours.


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  • CreatedApril 28, 2015
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