FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Suppose a SRS of 45 people who work in a city take an average os 21 minutes to get to work. We calculate a 95% confidence interval and get (18.3, 23.7).Which of the following statement(s) is(are) an INACCURATE interpretation the confidence level?
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95% of the 45 workers take between 18.3 and 23.7 minutes to get to work.
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There is a 95% chance that the mean time it takes all workers in this city to get to work is between 18.3 and 23.7 minutes.
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We are 95% confident that the mean time it takes all workers in the city to get to work is between 18.3 and 23.7 minutes.
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None of the above
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Explanation:
Detailed explanation-1: -The constant for 95 percent confidence intervals is 1.96.
Detailed explanation-2: -For a margin of error of 5% and confidence level 95% you will need 356 respondents in total (see also our sample size calculator, spread proportionally across the schools. This is when you want to draw conclusions for your population in general.
Detailed explanation-3: -1. A 95% confidence interval for the mean reading achievement score for a population of third-grade students is (44.2, 54.2).
There is 1 question to complete.