Question

A hungry college student just finished eating a large cheese and pepperoni pizza from​ Doug's Pizza Palace and felt there​ wasn't enough cheese and pepperoni on it as he has had large pizzas with more cheese and pepperoni on it from this place in the past. This led him to wonder what the average weight of a large cheese and pepperoni pizza was at​ Doug's Pizza Palace. Doug ordered a large cheese and 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?

Answer 1

Answer: 14

Explanation:

• Degrees of freedom is the number of values in the evaluation of a test statistic that are free to vary.

For t-statistic , the degree of freedom for a sample with sample size 'n' is given by :-

`df=n-1`

Given : Sample size : n-1

Then, the number of degrees of freedom the t-value will have :-

`df=15-1=14`

Hence, the t-value will have 14 degrees of freedom.