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 mean was 4.75 hours with a sample standard deviation of 2.0. Step 1 Identify variable and parameter with variable and words Individual: Variable Sample: Population: Step 2 Statistic Parameter Identify Null Hypothesis, Alternative Hypothesis, (words and algebraically) and Level of Significance Step 3 Ho Ha: Check for normality Is sample taken randomly? Normality Met? Step 4 N = Confident? Find sample statistic, test statistic and pvalue, Draw a picture. x = T = P Value= Sheet1 + SE = Tail = Units