An Ariel Capital Management and Charles Schwab survey addressed the proportion of African Americans and White Americans who have money invested in the stock market. Suppose the file titled Stockrace contains data obtained in the surveys. The survey asked 500 African American and 500 White respondents if they personally had money invested in the stock market.
a. Create a contingency table using the data in the file Stockrace.
b. Conduct a contingency analysis to determine if the proportion of African Americans differs from the proportion of White Americans who invest in stocks. Use a significance level of 0.05.