Alpine Research has conducted a survey of online shoppers.Simple random samples of 200 shoppers aged 18-to-25, 100 shoppers aged 26-to-40, and 100 shoppers aged 41-to-65 were selected for the survey.In the 18-to-25 sample, 80 shoppers (40%) expressed concerned about online security.Fifty of the 26-to-40 sample (50%) gave the same response.In the 41-to-65 sample, 66 shoppers (66%) expressed concern about online security. Below is a (partial) table of expected frequencies that you will use to conduct a chi-square test of the null hypothesis that the proportion of shoppers who are concerned about online security is the same for all three populations represented.Find the value of the chi-square test statistic.
Expected Frequencies

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The Answer of Alpine Research has conducted a survey of online shoppers.Simple random samples of 200 shoppers aged 18-to-25, 100 shoppers aged 26-to-40, and 100 shoppers aged 41-to-65 were selected for the survey.In the 18-to-25 sample, 80 shoppers (40%) expressed concerned about online security.Fifty of the 26-to-40 sample (50%) gave the same response.In the 41-to-65 sample, 66 shoppers (66%) expressed concern about online security. Below is a (partial) table of expected frequencies that you will use to conduct a chi-square test of the null hypothesis that the proportion of shoppers who are concerned about online security is the same for all three populations represented.Find the value of the chi-square test statistic.
Expected Frequencies

Alpine Research Has Conducted a Survey of Online Shoppers