Research Methods for the Behavioral Sciences (MindTap Course List)
5th Edition
ISBN: 9781305104136
Author: Frederick J Gravetter, Lori-Ann B. Forzano
Publisher: Wadsworth Publishing
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Textbook Question
Chapter 15, Problem 14E
Identify the appropriate hypothesis test for each of the following research situations.
a. A researcher conducts a between-subjects study to determine whether there is a significant difference in problem-solving ability between older adults who are generally happy and those who are generally unhappy.
b. A researcher gives a questionnaire to a group of 30-year-old married adults, including questions to measure the stability of their own marriages and the stability of their parents’ marriages. The researcher would like to know whether the two variables are related.
c. A researcher obtains a sample of 100 college students between 18 and 21 years old and a similar sample of 100 young adults who have no college experience. The researcher would like to know if there is a difference in the proportion of registered voters for the two groups.
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Identify the appropriate hypothesis test for each of the following research situations.
A researcher conducts a between-subjects study to determine whether there is a significant difference in problem-solving ability between older adults who are generally happy and those who are generally unhappy.
A researcher gives a questionnaire to a group of 30-year-old married adults, including questions to measure the stability of their own marriages and the stability of their parents’ marriages. The researcher would like to know whether the two variables are related.
A researcher obtains a sample of 100 college students between 18 and 21 years old and a similar sample of 100 young adults who have no college experience. The researcher would like to know if there is a difference in the proportion of registered voters for the two groups.
Identify the appropriate hypothesis test for each of the following research situations.
A researcher conducts a cross-sectional developmental study to determine whether there is a significant difference in vocabulary skills between 8-year-old and 10-year-old children.
A researcher determines that 8% of the males enrolled in Introductory Psychology have some form of color blindness, compared to only 2% of the females. Is there a significant relationship between color blindness and gender?
A researcher records the daily sugar consumption and the activity level for each of 20 children enrolled in a summer camp program. The researcher would like to determine whether there is a significant relationship between sugar consumption and activity level.
A researcher would like to determine whether a 4-week therapy program produces significant changes in behavior. A group of 25 participants is measured before therapy, at the end of therapy, and again 3 months after therapy.
A researcher would…
For the following research predictions, identify in a full sentence a) what the null and alternative hypotheses are, and b) if the null hypothesis is directional or non-directional. Be sure to account for all possible outcomes!
1. We believe men, on average, perform more aggressive behaviors than women.
2. We believe there is a negative relationship between feelings of happiness and attention to detail.
3. We believe there are differences in academic success between sorority members and fraternity members.
4. We believe there is some type of relationship between income and life satisfaction.
5. We believe Juniors and Seniors differ somehow in how many university activities they are a part of.
6. We believe business majors are more successful in getting hired during their first year after graduation compared to psychology majors.
Chapter 15 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
Ch. 15.1 - Define the two general categories of statistics,...Ch. 15.1 - Prob. 2LOCh. 15.2 - Prob. 3LOCh. 15.2 - Prob. 4LOCh. 15.2 - Prob. 5LOCh. 15.2 - Prob. 6LOCh. 15.3 - Prob. 7LOCh. 15.3 - Prob. 8LOCh. 15.3 - Explain how sample size and sample variance...Ch. 15.4 - Identify the characteristics that differentiate...
Ch. 15.5 - Describe the two basic concerns with the...Ch. 15.5 - Describe the basic concern with measuring...Ch. 15 - In addition to the key words, you should also be...Ch. 15 - Describe the two general purposes of statistics...Ch. 15 - Explain the difference between a statistic and a...Ch. 15 - Construct a frequency distribution histogram or...Ch. 15 - Under what circumstances are the median and the...Ch. 15 - For a distribution with a mean of 70 a. If the...Ch. 15 - A researcher obtains a correlation of r = -0.72...Ch. 15 - Prob. 8ECh. 15 - Briefly explain what is meant when a researcher...Ch. 15 - Prob. 10ECh. 15 - Describe the relationship between the alpha level...Ch. 15 - Explain how increasing the size of the sample can...Ch. 15 - Prob. 13ECh. 15 - Identify the appropriate hypothesis test for each...Ch. 15 - Prob. 15ECh. 15 - Prob. 16ECh. 15 - Prob. 1EACh. 15 - Make up a set of 10 pairs of scores (X and Y...
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