21. Ages of Robbery Victims A recent study in a small city stated that the average age of robbery victims was 63.5 years. A sample of 20 recent victims had a mean of 63.7 years and a standard deviation of 1.9 years. At a 0.05, is the average age higher than originally believed? Use the P-value method.
21. Ages of Robbery Victims A recent study in a small city stated that the average age of robbery victims was 63.5 years. A sample of 20 recent victims had a mean of 63.7 years and a standard deviation of 1.9 years. At a 0.05, is the average age higher than originally believed? Use the P-value method.
Essentials Of Investments
11th Edition
ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Publisher:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Chapter1: Investments: Background And Issues
Section: Chapter Questions
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Transcribed Image Text:21. Ages of Robbery Victims A recent study in a small
city stated that the average age of robbery victims was
63.5
years. A sample of 20 recent victims had a mean
of 63.7 years and a standard deviation of19 years.
At a = 0.05, is the average age higher than originally
believed? Use the P-value method.
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