It has been suggested that the number of hours grandparents spend looking after their grandchildren is related to their perceived levels of ‘usefulness’. A researcher decided to test this and recruited participants for a study where the number of hours spent looking after grandchildren per week was recorded. The participants also completed a standardized questionnaire rating ‘usefulness’ on a scale of 0 to 10 [0 = not very useful; 10 = extremely useful]. Choose your answers from the dropbox.* What analysis is required to test if grandparents who spend more time looking after their grandchildren also tend to have higher ‘usefulness’ scores? Binomial Test Cross-tabulation / Chi-Square test Independent samples t-test One-sample t-test Paired samples t-test Pearson’s correlation / Regression analysis *What research design has been used here? Observational Between Subjects Design Observational Matched Subjects Design Observational Within Subjects Design Experimental Between Subjects Design Experimental Matched Subjects Design Experimental Within Subjects Design
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Step 1: To test if grandparents who spend more time looking after their grandchildren also tend to have higher ‘usefulness’ scores, we need to analyze the relationship between the two variables - hours spent looking after grandchildren and ‘usefulness’ scores. Show more…
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For each of the studies, please indicate the following: 1) What type of research design is used (experiment; quasi-experiment; correlation, survey, etc.)? 2) The independent variable. 3) The levels of the independent variable. 4) The dependent variable. 5) If the design is experimental, is the IV tested between or within-subjects? Notes: - For predictor and outcome variables, if a design is not experimental, then state the N/A: predictor variable or NIA: outcome variable. - If a question is not applicable to a particular design, please note that using "NIA". - The researcher wants to understand to what extent variables such as financial difficulties, social support, and employment commitment impact an individual's ability to structure his or her time. - In order to answer this question, 100 unemployed executives are asked to complete a questionnaire that asks questions about financial difficulties, mental health, physical health, employment commitment, social support, and time structure.
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Read each brief report of statistical research, and identify a) whether it was an observational study or an experiment. If it was an observational study, identify (if possible) b) whether it was retrospective or prospective. c) the subjects studied and how they were selected. d) the parameter of interest. e) the nature and scope of the conclusion the study can reach. If it was an experiment, identify (if possible) b) the subjects studied. c) the factor(s) in the experiment and the number of levels for each. e) the response variable measured. f) the design (completely randomized, blocked, or matched). g) whether it was blind (or double-blind). h) the nature and scope of the conclusion the experiment can reach. In $2002,$ the journal Science reported that a study of women in Finland indicated that having sons shortened the life spans of mothers by about 34 weeks per son, but that daughters helped to lengthen the mothers" lives. The data came from church records from the period 1640 to 1870 .
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