Previously, an organization reported that teenagers spent an average of 4.1 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 5.25 hours with a sample standard deviation of 2.0. what are the null and alternate hypotheses? h0: μ = 5.25, ha: μ > 5.25 h0: x = 5.25, ha: x > 5.25 h0: x = 4.1, ha: x > 4.1 h0: μ ≥ 4.1, ha: μ < 4.1 h0: μ = 4.1, ha: μ > 4.1