Dataset: NES2004A_Student, Variables: enviro_therm, age] The results of an independent samples t-test are shown below. Are older people (those 30 or older) less sympathetic to the environmental movement than younger people (those younger than 30)? Or do younger people and older people not differ significantly in their feelings toward environmentalists? Using the SPSS results, test your hypothesis.
Table 3: Group Statistics
|
Respondent age |
N |
Mean |
Std. Deviation |
Std. Error Mean |
Feeling Thermometer: environmentalists |
>= 30 |
838 |
65.99 |
20.268 |
.700 |
< 30 |
205 |
66.20 |
19.923 |
1.391 |
Table 4: Independent Sample Test
|
Levene’s Test for Equality of Variance |
t-test for Equality of Means |
|||||
F |
Sig. |
t |
df |
Sig. |
Mean Difference |
||
Feeling Thermometer: environmentalists |
Equal variances assumed |
.095 |
.758 |
-.132 |
1041 |
.895 |
-.208 |
Equal variances not assumed |
|
|
-.134 |
315.445 |
.894 |
-.208 |
- Formulate a null and research hypothesis.
- Determine the level of significance.
- Based on the results of Levene’s test, find the proper t test statistic.
- Compare the test statistic to the critical value.
- Compare the p-value to the level of significance.
- Reject or do not reject the null hypothesis
- What is your conclusion?
