Question :
101. A(n) a measure of how strongly two variables : 1181962
101. A(n) is a measure of how strongly two variables are related to one another.
a) independent variable
b) dependent variable
c) experimental effect
d) correlation
102. Which of the following correlation coefficients represents the strongest relationship between two variables?
a) .50
b) .25
c) -.25
d) -.75
103. Paul records data that indicate that the number of hot chocolates sold at the concession stand increases as temperature outside decreases (for example, more hot chocolates are purchased during late fall than late spring). Which of the following statements is the most accurate depiction of this finding?
a) There is a correlation between the two variables.
b) There is a strong, positive correlation between the two variables.
c) There is a weak, positive correlation between the two variables.
d) There is a negative correlation between the two variables.
104. Julie finds that the number of hours she sleeps each night is related to the scores she receives on quizzes the next day. As her sleep approaches 8 hours, her quiz scores improve; as her sleep drops to 5 hours, her quiz scores show a similar decline. Julie realizes that ______________________.
a) there is a negative correlation between the number of hours she sleeps and her quiz grades
b) there is a positive correlation between the number of hours she sleeps and her quiz grades
c) her low quiz scores are caused by sleep deprivation the night before a quiz
d) she should sleep about 10 hours a night to ensure 100 percent quiz grades
105. A correlation coefficient is a numerical measure of the __________________.
a) unintended changes in participants’ behavior due to cues from the experimenter
b) relationship between two variables
c) behaviors of participants of different ages compared at a given time
d) behaviors of participants followed and periodically assessed over time
106. As a project for a psychology course, a student correlated weight and intelligence scores for 250 students. The computed correlation coefficient was .00. What did the scatter plot look like?
a) a random distribution of points
b) a line with a positive slope.
c) a straight line from the lower left to the upper right-hand corner
d) a straight line from the upper left to the lower right-hand corner
107. Drinking orange juice is negatively correlated with the risk of cancer. Based on this information, which of the following statements is true?
a) The more orange juice you drink, the higher your risk of cancer.
b) The more orange juice you drink, the lower your risk of cancer.
c) The less orange juice you drink, the lower your risk of cancer.
d) Drinking orange juice causes people to be cancer free.
108. Which correlation coefficient is most likely to describe the relationship between brushing one’s teeth and the number of cavities one gets?
a) -.62
b) .83
c) -.08
d) .45
109. Which of the following statements is correct concerning correlation coefficients?
a) A correlation of +.89 is strong and –.89 is weak.
b) A correlation of +.89 and –.89 are both strong and equally so.
c) Correlation coefficients are indicators of cause and effect.
d) A correlation of +1.5 is very strong.
110. Professor Holden gives a psychology exam on the origins of intelligence. She gives a short answer question based on the IQ scores of a parent–child pair. In order to answer the question correctly, her students need to remember that ________________.
a) a parent’s high IQ does not necessarily cause a child to have a high IQ
b) given these variables, the correlation will be positive
c) given these variables, the correlation will be negative
d) given these variables, the correlation will be uncorrelated
