A marketing research firm whishes to compare the prices charged by 2 supermarket chains - Publi'sandWally's . The research firm using a standardized one-week shopping plan (grocery lists, makes identical purchases at 100 of each chain's stores. The stores for each chain are randomly selected, and all purchases are made durin a single week. It is reasonable to assume that the samples are independent.

Weeky ExpensesPubli'sAverage Weekly Expenses of the 100stores$120.98

Sample Variance$3.93

Wally'sAverage Weekly Expenses of the 100 stores$115.03

Sample Variance$4.61

What is the degrees of freedom for the t distribution.

Round down your final answer to the closest integer