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Homework answers / question archive / FCSC 202 quiz Name: ____________________________ Random assignment of subjects to experimental and control groups DOES NOT allow you to generalize to the population
FCSC 202 quiz
Name: ____________________________
Random assignment of subjects to experimental and control groups DOES NOT allow you to generalize to the population. True or false?
What is the basic experimental technique used to reduce the probability of making a spurious conclusion.
In the following design assume that the alternative hypothesis was supported. Given this which sets of observations (i.e. two variables = a set) would you expect to see a significant difference and which sets would you expect NOT to be significantly different?
R O1A X O2B {Experimental group}
R O1C O2D {Control group}
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NOT SIGNIFICANTLY DIFFERENT |
SIGNIFICANTLY DIFFERENT |
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The sampling lecture displayed two major types of sampling designs. They were
10. _______________ and
11. _______________
A researcher wants to know the case profile of all CPS cases in Arizona. She chooses to sample the district 3 DES office cases here in Tucson because that is where she lives. She goes to the District 3 Office and gains access to the filing cabinets that contain the District 3 CPS cases. She uses a table of random numbers and collects case profiles from every 12th case in the District 3 filing cabinets. She reviews every 12th case and records a. the age of the child, b. how long they have been in foster care, c. the number of siblings d. whether or not the father is in prison, e. whether or not the mother is in prison. In this example;
What is the population of interest?
12. _________________________
What sampling DESIGN (HINT LECTURE 7 SLIDES 7 AND 8) did she use to select district 3?
13. ________________________
What sampling DESIGN (HINT LECTURE 7 SLIDES 7 AND 8) did she use to select cases for review at district 3?
14. ________________________
Can she generalize her findings to ALL cases in District 3? (Yes or no)
15. _____________________
Assume that a researcher wants to measure consumer preference for a brand of clothing using a questioner. They know that there is always some random error when measuring consumer preference. As a result they check the _________________ of the measurement instrument because it controls for random measurement error.
16. ____________________
A researcher randomly assigned undergraduate students to two groups, one group was not allowed to use social network media for two weeks and the other was allowed to use social network media to determine if there was a significant difference in their scores on the Research Methods Quiz.
For this example label the following rows and columns as they would appear in SPSS. Make sure you identify the IV and DV. Also include two covariates that may affect the results of this study.
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(18.) IV |
(19.) DV |
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(17.) |
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Assume that a researcher was studying the relationship between who adolescents live with (both mom and dad, sometimes mom sometimes dad, or grandparents or other family members and if it is OK for adults to use marijuana. The collected data and conducted a cross tabulation and chi square. Here are the results.
20. ___________What total NUMBER of adolescents disagreed that it is OK for adults to smoke weed?
21. __________ What percent of the adolescents who live with both mom and dad disagree with adults smoking weed?
22.___________ What percent of adolescents do not live with both mom and dad (trick question you will have to do some addition)?
23. ___________Of the “did not care group” 50% lived with who?
24.___________ Was there a significant relationship between who a juvenile lives with and whether or not they felt it is OK for adults to smoke weed?
25.___________ Which hypothesis (alternative or null) would you accept based on the Chi-Square test?
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