A marketing research firm whishes to compare the prices charged by 2 supermarket chains - Publi's and Wally's . The research fırm using a standardized one-week shopping plan (grocery lists, makes...

Extracted text: A marketing research firm whishes to compare the prices charged by 2 supermarket chains - Publi's and Wally's . The research fırm using a standardized one-week shopping plan (grocery lists, makes identical purchases at 50 of each chain's stores. The stores for each chain are randomly selected, and all purchases are made during a single week. It is reasonable to assume that the samples are independent. We are unwilling to assume that the population variances are equal. Weeky Expenses Publi's Average Weekly Expenses of the 50stores $120.96 Sample Variance $67.07 Wally's Average Weekly Expenses of the 50 stores Sample Variance $115.72 $68.31 What is the degrees of freedom for the t distribution - If needed round your intermediate calculations to no more than 4 decimal places. Round down your final answer to the closest integer