psychologist obtains a random sample of 30 mothers in the first trimester of their pregnancy. The mothers are asked to play Mozart in the house at least 45 minutes each day until they give birth. We know that IQs are normally distributed with a mean of 100. A few years after their births the children were given an IQ test and the IQs of the 30 children in the study resulted in a sample mean of 104.2. Assume the population standard deviation for IQ of children is 15. Is there evidence that the children who listen to Mozart for at least 45 minutes each day during pregnancy have higher IQs at the 0.05 level of significance? Step 1: Define the parameter & setup the test Step 2: State the Level of Significance Step 3: Find the value of the Test Statistics Step 4: Find P-Value OR Find Critical Value
A psychologist obtains a random sample of 30 mothers in the first trimester of their pregnancy. The
mothers are asked to play Mozart in the house at least 45 minutes each day until they give birth. We
know that IQs are
A few years after their births the children were given an IQ test and the IQs of the 30 children in the
study resulted in a sample mean of 104.2. Assume the population standard deviation for IQ of children is
15.
Is there evidence that the children who listen to Mozart for at least 45 minutes each day during
pregnancy have higher IQs at the 0.05 level of significance?
Step 1: Define the parameter & setup the test
Step 2: State the Level of Significance
Step 3: Find the value of the Test Statistics
Step 4: Find P-Value OR Find Critical Value
Step 5: State Conclusion and why
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