A researcher hypothesizes that college students' mean score on 100 - point quiz about the US Constitution is grater than 70. The researcher samples 250 college students. The sample mean is 74.375 and the students 's quiz scores have a strander deviation 22.832. The researcher conducts a null hypothesis significance test using a one - sample difference of mean test.

1. What is the standard error of this sample mean?
2. What is the test statistic (t-statistic)?
3. What is the P- value of this t-statistic given the directional hypothesis?
4. What conclusion should the researcher make with respect to the null hypothesis?

Reject the null hypothesis

Fail to reject the null hypothesis