Apsychologist obtains a random sample of 20 mothers in the first trimester of their pregnancy. The mothers are asked to play Mozart in the house at least 30 minutes each day until they give birth. After 5 years, the child is administered an IQ test. It is known that IQs are normally distributed with a mean of 100. If the IQs of the 20 children in the study result in a sample mean of 104.2 and sample standard deviation of 14.5, is there evidence that the children have higher IQs? Use the a=0.10 level of significance What type of hypothesis test is appropriate to conduct for this research? A. Hypothesis test on a population standard deviation B. Hypothesis test on a population mean OC. Hypothesis test on a population proportion Determine the null and alternative hypotheses. V Ho H₂ V (Type integers or decimals. Do not round.)

How do I solve?

How do I solve?

twenty two more than four times a number is equal to the dofference between 155 ans three times the number. whats the number