Question

Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that, currently, the Mean is higher. Fifteen randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample meanwas 4.75 hours with a sample standard deviation of 2.0. state the null and alternative hypothesis

Answer 1

SOLUTION:

For this problem, we can state the null and alternate hypotheses as ;

The null hypothesis is what we want to contest against.

The alternate hypothesis is the statement we want to use in countering it.

$\begin{gathered} H_o:\mu=4.5 \\ H_a:\mu>4.5 \end{gathered}$