Question

A researcher is studying whether the number of video games played per week decreases for students who hold a job while attending school and students who do not hold a job while attending school. (i): write using symbols the null hypothesis and the alternate hypothesis (ii): write as to whether it is: (a): a directional research alternate hypothesis; (b): a non-directional research alternate hypothesis. If it is directional alternate hypothesis, then say as to whether it is upper-tailed or lower-tailed test

Answer 1

I) Null hypothesis Ho : $\mu$ 1 = $\mu$ 2

Alternative hypothesis H1 : $\mu$ 1 < $\mu$ 2

II ) a directional research hypothesis

Left tailed test