Junior: Freshman: Normal: Mean=23.792, SD=4.4951 Frequency 12! 12 Normal: Mean-23.12, SD-3.8004 Frequency 10 10- 8 To 15 20 25 30 35 МАТH 15 20 30 33 ΜΑΤΗ Senior: Sophomore: Normal: Mean-22.847, SD-3.9558 Frequency 16 16 15 10 20 25 МАТH 30 15

What happens to the graph of the normal curve as the mean increases?

What position in the distribution corresponds to a z-score of z = +2.00?​

What is left skewed distribution

Does playing Mozart for unborn babies result in having children with higher IQs?    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 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? Use the p-value approach. a. Define the parameter we are testing and setup a hypothesis test to see if the mean IQ of children who listened to Mozart at least 45 minutes a day during pregnancy is higher than the national mean of 100: b. Calculate the test statistics for this…

What does it mean to say that the graph of the normal distribution is symmetric?

Does playing Mozart for unborn babies result in having children with higher IQs?    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 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? Use the p-value approach.   Select the correct conclusion for this test: We fail to reject the null hypothesis because the p-value is less than the level of significance. We fail to reject the null hypothesis because the p-value is greater than the level of significance. We…

The time spent​ (in days) waiting for a heart transplant in two states for patients with type A+ blood can be approximated by a normal​ distribution, as shown in the graph to the right. Complete parts​ (a) and​ (b) below. u= 134 0=18.1 What is the shortest time spent waiting for a heart that would still place a patient in the top 30​% of waiting​ times?