SKU: 56144872584

Sample Size Illustrations, Confidence Intervals, & Margins of Error: Jeffreys Method Tables for Attorneys & Experts: 80 Percent Confidence Level

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Description

Sample Size Illustrations, Confidence Intervals, & Margins of Error: Jeffreys Method Tables for Attorneys & Experts: 80 Percent Confidence LevelThis volume will assist both non statisticians and statisticians in determining an appropriate sample size to be taken and the confidence intervals and margins of error for samples that have already been taken using the Jeffreys method at the 80 percent confidence level. This volume is designed to help with a specific kind of sample, one in which each member can be assigned into one of two groups (defective or not, good or bad, working or unemployed,

This volume will assist both non-statisticians and statisticians in determining an appropriate sample size to be taken and the confidence intervals and margins of error for samples that have already been taken using the Jeffreys method at the 80 percent confidence level. This volume is designed to help with a specific kind of sample, one in which each member can be assigned into one of two groups (defective or not, good or bad, working or unemployed, married or single, yes or no, liked or disliked, etc.)
Sample sizes in this book range from one to 4,500 for determining sample size illustrations and one to 250 for determining confidence intervals and margins of error.
Tables for 85, 90, 95 and 99 percent confidence levels can be purchased as separate volumes from Walnut Oak Press.

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SKU: 56144872584

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KGodwin
Massapequa, US
★★★★★ 5
Useful, Nicely-Designed Organizational Tray
Color: Black Frame
Purchased on behalf of another person, when asked they stated they adored this dresser tray. They found it the right size to hold everything they needed it to, a helpful way to stay organized, and easy to move and use. The price is what made them purchase it but they found it to be of a nice quality once they got it set up and have been using it daily ever since. Would recommend.
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Reviewed in the United States on July 21, 2025
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Mark
Draper, US
★★★★★ 5
Stylish, well sized valet tray. Would highly recommend
Color: Brown Frame
Stylish valet for your dresser, desk or wherever you would like to place it. I got tired (and so did my wife) of me just emptying my pockets on the dresser at the end of each day. Junk would accumulate, change would accumulate and everything was all spread out. This tray is stylish and made of good quality leather. I really like the different size partitions making its storage capacity perfect and done so neatly. Now my items are organized and easy to grab the next day making it functional at the same time.
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Reviewed in the United States on July 2, 2025
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Jeffery B
Birmingham, US
★★★★★ 5
Great Christmas Gift for the EDC Carrying Guys
Color: Black Frame
Great EDC tray. Nice quality and looks even better than in the pictures. Going to give one to each of my boys for Christmas.
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Reviewed in the United States on November 26, 2025
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Diane clohesy
Charlottesville, US
★★★★★ 4
Handy little car addition
Color: Black Frame
works great in the car (on passenger seat)
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Reviewed in the United States on May 26, 2025
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Caleb Stinespring
Waukegan, US
★★★★★ 5
Simple and Super Useful
Color: Black Frame
This tray is great. It looks really nice on my desk and gives me one easy spot to drop everything—phone, wallet, keys, sunglasses, glasses, and whatever else I’m carrying that day. Keeps things organized and adds a clean look to the space.
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Reviewed in the United States on March 13, 2026

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