Homework SourseGroup Statistics FAVOR OR OPPOSE GUN PERMITS N Mean Std Devi
Group Statistics
FAVOR OR OPPOSE GUN PERMITS
N
Mean
Std. Deviation
Std. Error Mean
HIGHEST YEAR OF SCHOOL COMPLETED
FAVOR
761
13.47
3.039
.110
OPPOSE
224
13.42
3.230
.216
Group Statistics
HIGHEST YEAR OF SCHOOL COMPLETED
N
Mean
Std. Deviation
Std. Error Mean
FAVOR OR OPPOSE GUN PERMITS
1
1
1.00
.
.
2
2
1.50
.707
.500
Independent Samples Test
Levene\'s Test for Equality of Variances
t-test for Equality of Means
F
Sig.
t
df
Sig. (2-tailed)
Mean Difference
Std. Error Difference
95% Confidence Interval of the Difference
Lower
Upper
HIGHEST YEAR OF SCHOOL COMPLETED
Equal variances assumed
.195
.659
.225
983
.822
.053
.234
-.407
.513
Equal variances not assumed
.217
347.412
.828
.053
.242
-.424
.529
Homework 3.2 Name:
Due: Jan. 9
Use GSS file to analyze the following problems. Please read Summary: SPSS for t test in the Blackboard in the Discussion section.
Does person’s education influence his/her attitude toward gun control? A researcher selected two groups, 1) those who oppose to, and 2) those who were in favor of gun control. Then tested years of education to see is there is a significant difference between the two groups.
Open GSS and perform two-sample test and write the output results in the space provided below:
“Favor” group
Sample size (N): ------------- Mean: ------------------ Standard Dev.: --------------------
“Oppose” group
Sample size (N): ----------- Mean: ---------------- Standard Dev.: -------------------------
T value: ---------------- Significance (assuming equal variance): --------------------
Conclusion: Does person’s education a factor influencing his/her opinion on gun control? --------
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The replacement level is the amount of fertility needed to keep the population the same from generation to generation. It refers to the total fertility rate that will result in a stable population without it increasing or decreasing. Demographers set the replacement level at 2.1 children per family. At this level, the population is said to be a stable population. Assuming that GSS is a sample of U.S. population.
Use GSS to obtain the mean and standard deviation of number of children in American family (childs). Perform a one-sample “t test.” Write the results in the blank below
Mean children per family variable in the sample: -------------------------------
Standard deviation of the variable ------------------------------
T value: -------------- Significance:------------------------------------
Write your conclusion: Is there a significant difference between the sample mean of children per family and the population mean? Why?
Is the U.S. population of a stable population? Why?
| Group Statistics | |||||
| FAVOR OR OPPOSE GUN PERMITS | N | Mean | Std. Deviation | Std. Error Mean | |
| HIGHEST YEAR OF SCHOOL COMPLETED | FAVOR | 761 | 13.47 | 3.039 | .110 |
| OPPOSE | 224 | 13.42 | 3.230 | .216 |
Solution
I will only answer the first question here. Please ask the second question seperately.
Does person’s education influence his/her attitude toward gun control? A researcher selected two groups, 1) those who oppose to, and 2) those who were in favor of gun control. Then tested years of education to see is there is a significant difference between the two groups.
Open GSS and perform two-sample test and write the output results in the space provided below:
“Favor” group
Sample size (N): 761 Mean: 13.47 Standard Dev.: 3.039
“Oppose” group
Sample size (N): 224 Mean: 13.42 Standard Dev.: 3.230
T value: 0.225 Significance (assuming equal variance): 0.822
Conclusion: Does person’s education a factor influencing his/her opinion on gun control? yes
Since the significance is greater, person\'s education is indeed a fator influencing his/her opinion on gun control.
