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Suppose that experiment to see if taking vitamin C. vitamin D, or both, help prevent or reduce cold symptoms was conducted based on a random sample of 1981 individuals, Subjects were assigned to receive vitamin Conly, vitamin D only, vitamin C and D, or placebo, and then were monitored for the duration of the cold season to see if they developed a cold or not. The results were tabulated in a two-way table in which the column variables were the vitamin supplements and the row variables were the cold responses. Researchers then conducted a chi-square test for independence to see if cold responses and vitamin supplements are dependent. How many degrees of freedom does the chi-square statistic have? df

Suppose that experiment to see if taking vitamin C. vitamin D, or both, help prevent or reduce cold symptoms was conducted based on a random sample of 1981 individuals, Subjects were assigned to receive vitamin Conly, vitamin D only, vitamin C and D, or placebo, and then were monitored for the duration of the cold season to see if they developed a cold or not. The results were tabulated in a two-way table in which the column variables were the vitamin supplements and the row variables were the cold responses. Researchers then conducted a chi-square test for independence to see if cold responses and vitamin supplements are dependent. How many degrees of freedom does the chi-square statistic have? df

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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Suppose that experiment to see if taking vitamin C, vitamin D, or both, help prevent or reduce cold symptoms was conducted based on a random sample of 1981 individuals, Subjects were assigned to receive vitamin C only, vitamin D only, vitamin C and D, or placebo, and then were monitored for the duration of the cold season to see if they developed a cold or not. The results were tabulated in a two-way table in which the column variables were the vitamin supplements and the row variables were the cold responses. Researchers then conducted a chi-square test for independence to see if cold responses and vitamin supplements are dependent. How many degrees of freedom does the chi-square statistic have? df=
Transcribed Image Text:Suppose that experiment to see if taking vitamin C, vitamin D, or both, help prevent or reduce cold symptoms was conducted based on a random sample of 1981 individuals, Subjects were assigned to receive vitamin C only, vitamin D only, vitamin C and D, or placebo, and then were monitored for the duration of the cold season to see if they developed a cold or not. The results were tabulated in a two-way table in which the column variables were the vitamin supplements and the row variables were the cold responses. Researchers then conducted a chi-square test for independence to see if cold responses and vitamin supplements are dependent. How many degrees of freedom does the chi-square statistic have? df=
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