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...


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<br>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<br>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<br>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<br>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<br>2.<br>Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below.<br>Ho :H1 = 42<br>I:

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 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Ho :H1 = 42 I: "H

Jun 03, 2022
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