Question : 81. Nina wants to know whether there a market for a : 1201776

81. Nina wants to know whether there is a market for a brand-new product, the Arctic Blast, which freezes all types of food within seconds. To find out what percentage of people and what types of people might be interested in such a product, Nina needs to use which research method? 
A. A survey
B. Naturalistic observation
C. A case study
D. An experiment

82. Nancy wants to collect data about the shopping habits of two-career families. She has very little money to pursue this study, and her research advisor wants the results as soon as possible. Nancy should collect her data by 
A. administering a survey.
B. doing naturalistic observation.
C. following one case study.
D. conducting an experiment.

83. One limitation of case studies that surveys are able to address is: 
A. The lack of experimental groups
B. The lack of control groups
C. Confounding variables
D. Small sampling sizes

84. Which correlation coefficient indicates the strongest relationship between two variables? 
A. +.68
B. –.35
C. –1.00
D. +.15

85. Which of the following correlation coefficients best supports the assertion that the likelihood of a poor grade decreases as class attendance increases? 
A. –.90
B. +.70
C. –.37
D. +.23

86. Biff has discovered a correlation of -0.83 between the amount of time his fraternity brothers spend working out in the gym and the number of dates they have during the semester. Based on this information, Biff should conclude that 
A. the more the men work out, the more dates they have.
B. the more the men work out, the fewer dates they have.
C. working out causes an increase in dates.
D. working out causes a decrease in dates.

87. Mario tested the relationship between violence and population density. He found a correlation coefficient of –0.75. What can you conclude? 
A. Population density and violence are not related.
B. A higher population density causes more violence.
C. A higher population density is associated with more violence.
D. A higher population density is associated with less violence.

88. Which of the following research designs is characterized by an effort to keep all variables constant except for the variable being manipulated and the variable being measured? 
A. Survey
B. Case study
C. Experiment
D. Naturalistic observation

89. A researcher was interested in determining whether or not the test performances of students could be improved by providing them with individual tutoring. The researcher randomly divided fifty first-year college students into two groups. In Group A the instructor lectured to them for three hours per week. Group B received an equal amount of lecturing, but their instructor also met with each student for thirty minutes every week. Each group took the same final exam. The test performance of students in Group B was about the same as that of students in Group A. This study is an example of a(n) 
A. correlational study.
B. case study.
C. experiment.
D. survey.

90. The title of a research article is “Hot and Crowded: The Effects of Altering Temperature and Group Size on Exam Performance.” What research method was used in this study? 
A. Naturalistic observation
B. Survey
C. Experiment
D. Case study