Suppose that a marketing manager is studying sales data for products that are not available in stores and are only sold online. She collects the following weekly sales data for 8 products not sold in stores. Assume the population standard deviation for these data is $5600. Weekly Sales Figures Product Weekly Sales ($) 1 29,738 2 17,078 3 16,914 4 23,889 5 18,474 6 24,754 7 24,699 8 23,924 Step 1 of 2 : Find the value of the chi-square statistic for these data. Round your answer to three decimal places, if necessary.