A random sample of 12th-grade students were asked to rate the importance of reducing pollution on a scale from 0 to 1000. Responses were recorded by gender. The results of a hypothesis test are shown. Assume the conditions for using a two-sample t-test are met.

a. Which group has a higher mean, and how do you know?

b. Test the hypothesis that the mean rating for males and females are different, using a significance level of 0.05.

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Two sample T hypothesis test: P1: Mean of Importance_reducing_pollution where Gender="Male" P2: Mean of Importance_reducing_pollution where Gender="Female" H1- 42 : Difference between two means Ho : H1 - P2 = 0 HA : P1 - Pz + 0 (without pooled variances) Hypothesis test results: Difference Sample Diff. Std. Err. DF T-Stat P-value P1- 42 -46.652174 65.836748 93.638114 -0.70860386 0.4803