A hungry college student just finished eating a large cheese and pepperoni pizza

Question

A hungry college student just finished eating a large cheese and pepperoni pizza form Doug's Pizza palace and felt there wasn't enough cheese and pepperoni on it as he has had a large pizza with more on it from the pizza place in the past. This led him to wonder the average weight of a large cheese pepperoni pizza from doug's pizza palace on 15 randomly selected days during a particular term and weighed each before eating it. Suppose all conditions are met for inference using the one-sample t-methods. The student constructed a 95% confidence interval for the population mean using the one-sample t-methods. How many degrees of freedom does the t critical value have.

A) 15 B)1.96 C) 14 D) The critical t-value does not have degrees of freedom.

Explanation / Answer

df = n-1 = 15 - 1 = 14

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