To finish  this scenario, use the Mall of Elbonia Interview Results (Elbonia Labled below).

One hundred customers at the Mall of Elbonia (MoE) were given a short interview as they finished their shopping trips. Observe the resulting data in the Mall of Elbonia Interview Results (Elbonia Labled below). For every customer (by row), the spreadsheet contains data on:

• The customer's gender.
• How long the customer spent in the mall.
• How much he or she spent on food and clothing purchases.
• The customer's rating of the mall's friendliness and attractiveness.

MoE's concessions manager believes the average amount that mall customers spend on food during a visit has increased over the historical average of $18.75, because of the opening of some new upscale restaurants in the mall. Use the data in the file to test his hypothesis (Hypothesis Calculators Labled below).

• What is the null hypothesis?
• Would you refuse it at alpha = .05?