A researcher is interested in whether students who are musicians have higher intelligence test scores than students in the general population. The researcher predicts that playing a musical instrument is associated with higher intelligence test scores. The researcher selects a sample of 75 musicians from local high schools and gives them an intelligence test. The mean for the sample is 105 . The
mean for the general population (ยต) is 100 with a standard deviation (s) of 15 . What is zobt for this sample?
a. 0.33
b. 1.89
c. 2.89
d. 3.25
c
Psychology
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In the first half of the 20th century, physical makeup referred to _________, whereas now it refers to
a. genes; physique. b. physique; genes. c. genes; brain processes. d. brain processes; genes.
Psychology
Assume that 30 mg of drug A puts 10% of people to sleep and that 100 mg of drug A puts 80% of people to sleep. Assume that drug B has no effect on sleep at any dose (except at lethal doses)
If we give 100 mg of drug B along with 30 mg of drug A, we observe that the combination puts 50% of people to sleep. What phenomenon are we observing? Explain your answer. What will be an ideal response?
Psychology