A parent interest group is looking at whether birth order affects scores on the ACT test. It was suggested that, on average, first-born children earn lower ACT scores than second-born children. After...

Extracted text: A parent interest group is looking at whether birth order affects scores on the ACT test. It was suggested that, on average, first-born children earn lower ACT scores than second-born children. After surveying a random sample of 225 first-born children, the parents' group found that they had a mean score of 24.4 on the ACT. A survey of 125 second-born children resulted in a mean ACT score of 24.7. Assume that the population standard deviation for first-born children is known to be 1.5 points and the population standard deviation for second-born children is known to be 0.8 points. Is there sufficient evidence at the 5 % level of significance to say that the mean ACT score of first-born children is lower than the mean ACT score of second-born children? Let first-born children be Population 1 and let second-born children be Population 2. Step 3 of 3: Draw a conclusion and interpret the decision. Answer E Tables E Keypad Keyboard Shortcuts We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.05 level of significance to support the parent interest group's claim that first- born children earn lower ACT scores on average than second-born children. {1} We reject the null hypothesis and conclude that there is sufficient evidence at a 0.05 level of significance to support the parent interest group's claim that first-born children earn lower ACT scores on average than second-born children. We reject the null hypothesis and conclude that there is insufficient evidence at a 0.05 level of significance to support the parent interest group's claim that first-born children earn lower ACT scores on average than second-born children. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.05 level of significance to support the parent interest group's claim that first- born children earn lower ACT scores on average than second-born children. b V