Answer to Question #148320 in Statistics and Probability for Vladimyr Lubin

Question

(8.3.2) 28 different video games showing alcohol use were observed. The duration times of ​alcohol use(in seconds) were recorded. When using this sample for a t test of the claim that the population mean is greater than 86 ​sec, what does df​ denote, and what is its​ value?
The value of df is ?

Answer 1

df denotes the number of degrees of freedom which gives the measure of independent observations in the study.

Here we have sample size n = 28.

df = n – 1 = 28 – 1 = 27

Answer: df denotes degrees of freedom and its value is 27