Question
Assignment A: Elaboration - Chi Square (Please pay attention to numbers marked in color) Please examine the following tables and answer questions on page 2
Assignment A: Elaboration - Chi Square (Please pay attention to numbers marked in color)
Please examine the following tables and answer questions on page 2
Table 1: Chi Square Test between Gender (I.V.) and Care Accidents (D.V.) without Using Control Variable (Bivariate Relationship, %) | |||||
Gender (I.V.) | Total | ||||
Female | Male | ||||
Car Accidents (D.V.) | Few accidents | Count (N) | 200 | 85 | 285 |
% | 66.7% | 34.0% | 51.8% | ||
Many accidents | Count (N) | 100 | 165 | 265 | |
% | 33.3% | 66.0% | 48.2% | ||
Total | Count (N) | 300 | 250 | 550 | |
% | 100.0% | 100.0% | 100.0% |
Table 2: Chi-Square Tests (Bivariate Relationship, Sig.)
Value | df | Asymptotic Significance (2-sided) | |
Pearson Chi-Square | 58.283a | 1 | .000 |
Continuity Correctionb | 56.982 | 1 | .000 |
Likelihood Ratio | 59.308 | 1 | .000 |
Fisher's Exact Test | |||
Linear-by-Linear Association | 58.177 | 1 | .000 |
N of Valid Cases | 550 |
The following tables demonstrated the results ofelaboration with "miles driven" being added as the control variable.After introducing the control variable, two partial tables were produced, one for "Had Driven Few Miles" and another for "Had Driven Many Miles"
Table 3: Partial Table for the "Few Miles Driven" Group (%) | ||||||
Miles Driven | Gender | Total | ||||
Female | Male | |||||
Driven Few Miles | Car Accidents | Few accidents | Count (N) | 180 | 45 | 225 |
% | 90.0% | 90.0% | 90.0% | |||
Many accidents | Count (N) | 20 | 5 | 25 | ||
% | 10.0% | 10.0% | 10.0% | |||
Total | Count | Count (N) | 50 | 250 | ||
% | % | 100.0% | 100.0% |
Table 4: Chi-Square Tests (Partial Table for the "Few Miles Driven" Group, Sig.)
Miles Driven | Value | df | Asymptotic Significance (2-sided) | |
Driven Few Miles | Pearson Chi-Square | .000c | 1 | 1.000 |
Continuity Correctionb | .000 | 1 | 1.000 | |
Likelihood Ratio | .000 | 1 | 1.000 | |
Fisher's Exact Test | ||||
Linear-by-Linear Association | .000 | 1 | 1.000 | |
N of Valid Cases | 250 |
Table 5: Partial Table for "Many Miles Driven" Group (%)
Miles Driven | Gender | Total | ||||
Female | Male | |||||
Driven Many Miles | Car Accidents | Few accidents | Count (N) | 20 | 40 | 60 |
% | 20.0% | 20.0% | 20.0% | |||
Many accidents | Count (N) | 80 | 160 | 240 | ||
% | 80.0% | 80.0% | 80.0% | |||
Total | Count | Count | 200 | 300 | ||
% | % | 100.0% | 100.0% |
Table 6: Chi-Square Tests (Partial Table for "Many Miles Driven" Group, Sig.)
Miles Driven | Value | Value | df | Asymptotic Significance (2-sided) |
Driven Many Mile | Pearson Chi-Square | .000c | 1 | 1.000 |
Continuity Correctionb | .000 | 1 | 1.000 | |
Likelihood Ratio | .000 | 1 | 1.000 | |
Fisher's Exact Test | ||||
Linear-by-Linear Association | .000 | 1 | 1.000 | |
N of Valid Cases | 300 |
Please answer the following questions:
- Explain what Elaboration is and why this procedure is necessary in research (please refer to the lecture and the text).
- Based on your computing results, explain the bivariate relationship between Gender and Car Accidents - if Gender affects the number of accidents (between few and many)? Use percentages and statistical significance to explain the Chi Square result.
- After introducing the control variable "Miles driven", did the original relationship between Gender and Car Accidents change? Explain what type of change that the control variable has. Please use the findings (percentagesand statistical significance) in your explanation.
Please continue to answer questions on Assignment B.
Assignment B: Multiple Regression (Please pay attention to numbers marked in color)
Please examine the following tables of the ways 5 independent variables may have affected students' overall satisfaction with YSU. Please answer questions in page 4
In Table 1, "Variables Entered" are the independent variables that affect the dependent variable Overall Satisfaction with YSU simultaneously.
Table 1: Variables Entered/Removed | |||
Model | Variables Entered | Method | |
1 | Independent Variables: tuition value, sense of belonging, faculty help, academic programs, staff's ability . | Enter | |
a. Dependent Variable: var 103 overall satisfaction | |||
b. All requested variables entered. |
In Table 2 please pay attention to R Square, .430 means 43% of the reasons of why or why not YSU students are satisfied with YSU were explained by this model (or all independent variables included in the model).
Table 2: Model Summary | ||||
Model | R | R Square | Adjusted R Square | Std. Error of the Estimate |
1 | .656a | .430 | .427 | .615 |
a. Predictors: (Independent Variables), tuition value, sense of belonging, faculty help, academic programs, staff's ability |
The ANOVA table (Table 3) shows the model is statistically significant at .001 level.
Table 3: ANOVAa | ||||||
Model | Sum of Squares | df | Mean Square | F | Sig. | |
1 | Regression | 238.468 | 5 | 47.694 | 126.150 | .000b |
Residual | 316.065 | 836 | .378 | |||
Total | 554.533 | 841 | ||||
a. Dependent Variable: var 103 overall satisfaction | ||||||
b. Predictors: (Independent Variables), tuition value, sense of belonging, faculty help, academic programs, staff's ability |
In Table 4 please pay attention to the beta values, the higher the beta, the greater the impact on the dependent variable.
Table 4: Coefficientsa | |||||||
Model | Unstandardized Coefficients | Standardized Coefficients | t | Sig. | |||
B | Std. Error | Beta | |||||
1 | Independent Variables | .763 | .120 | 6.343 | .000 | ||
academic programs | .289 | .029 | .311 | 10.064 | .000 | ||
faculty help | .118 | .025 | .146 | 4.773 | .000 | ||
staff's ability | .090 | .026 | .106 | 3.423 | .001 | ||
sense of belonging | .129 | .024 | .150 | 5.350 | .000 | ||
tuition value | .169 | .024 | .215 | 6.923 | .000 | ||
a. Dependent Variable: var 103 overall satisfaction | |||||||
Please answer the following questions:
- Explain what multiple regression is, the meaning of R and Beta, and under what circumstances multiple regression is used. Please make reference to the lecture notes and the text when you answer this question.
- Explain the meaning resulting R. Please refer to Table 2.
- Write down two hypotheses about which independent variable has the most effect on var103 and which variable has the least effect on var103 overall satisfaction with YSU.
H1:
H2:
- Based on the results of multiple regression (Beta and Sig.), do you accept or reject your hypotheses? Write "accepted" or "rejected" after each of your hypothesis and briefly explain why. Please refer to Table 4.
H1:
H2:
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