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Show transcribed image text 5. The chi-square test for goodness of fit – No difference from a known population Suppose you are reading a study conducted in the year 2000 about people who are left-handed in the United States. The authors report the following frequency data on the age of the 1,568 people who are left-handed in their random sample: Observed Frequencies Age Group Over 65 years 45-65 years 25-44 years 15-24 years Under 15 years 549 94 282 235 408 You wonder if the age distribution of people who are left-handed matches the age distribution of the U.S. population. You obtain the following data from the 2000 census: Percent Distribution of the U.s. Population by Age Group Age Group Over 65 years 45-65 years 25-44 years 15-24 years Under 15 years 30.22% 12.43% 22.01% 13.93% 21.41% the 20th century, U.S. Census Bureau.J You use a chi-square test for goodness of fit to see how well the sample of people who are left-handed fits the census data. What is the most appropriate null hypothesis? O The distribution of ages among people who are left-handed is different from that provided by the census data
5. The chi-square test for goodness of fit – No difference from a known population Suppose you are reading a study conducted in the year 2000 about people who are left-handed in the United States. The authors report the following frequency data on the age of the 1,568 people who are left-handed in their random sample: Observed Frequencies Age Group Over 65 years 45-65 years 25-44 years 15-24 years Under 15 years 549 94 282 235 408 You wonder if the age distribution of people who are left-handed matches the age distribution of the U.S. population. You obtain the following data from the 2000 census: Percent Distribution of the U.s. Population by Age Group Age Group Over 65 years 45-65 years 25-44 years 15-24 years Under 15 years 30.22% 12.43% 22.01% 13.93% 21.41% the 20th century, U.S. Census Bureau.J You use a chi-square test for goodness of fit to see how well the sample of people who are left-handed fits the census data. What is the most appropriate null hypothesis? O The distribution of ages among people who are left-handed is different from that provided by the census data
