Question

thirty - seven different video games showing violence were observed. the duration times of violence (in seconds) were recorded. when using this sample for a t test of the claim that the population mean is greater than 89 sec, what does df denote, and what is its value?
what does df denote?
a. the test statistic
b. the sample standard deviation
c. the number of degrees of freedom
d. the sample size
the value of df is
(type an integer or a decimal. do not round.)

Explanation:

Step1: Recall the formula for degrees of freedom in a t - test

In a one - sample t - test, the formula for degrees of freedom ($df$) is $df=n - 1$, where $n$ is the sample size.

Step2: Identify the sample size

The sample size $n = 37$ (since 37 video games were observed).

Step3: Calculate the degrees of freedom

Using the formula $df=n - 1$, substitute $n = 37$ into the formula. So, $df=37-1$.

Answer:

C. The number of degrees of freedom
The value of $df$ is $36$.