How to Measure Anything Workbook: Finding the Value of Intangibles in Business by Douglas W. Hubbard

Author:Douglas W. Hubbard
Language: eng
Format: mobi, pdf
ISBN: 9781118860397
Publisher: Wiley
Published: 2014-02-25T18:30:00+00:00

If you have a sample size of 26, which two samples can you use to approximate the 90% confidence interval bounds for the median? The first and last

The ninth largest and the ninth smallest

The second largest and the second smallest

The fourth largest and the fourth smallest

True or False: When using the “mathless” 90% confidence interval for the median, you don’t have to make assumptions about the under- lying population distribution. True

False

Suppose you are trying to determine what percentage of the time actuaries at your insurance company use statistical software. You randomly poll 20 people at randomly selected times and ask what they are doing at the moment you poll them. Of those, four say they are using the statistical software at that moment. What kind of sample is this, and what is the 90% confidence interval for the share of time staff spend using this software? Spot, 9.9% to 38%

Serial, 16.3% to 28%

Student’s t, 17% to 54%

Stratified, 3% to 71%

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