Discussion:
Q: Independent T-test analysis for you on the difference between mathematics standardized scores for a small sample of students in Veracruz, Mexico given their vision as either blurry or ok. Are the average scores different? At what level of significance? Is it what you would expect? What could account for this difference?
T-test mean differences in mathematics scores for students with blurry and clear vision.
|
Group Statistics
|
|
|
vision
|
N
|
Mean
|
Std. Deviation
|
Std. Error Mean
|
|
math
|
Blurry
|
41
|
45.041
|
4.8730
|
.7610
|
|
Ok
|
1251
|
48.168
|
5.9676
|
.1687
|
Independent Samples Test
|
|
Levene's Test for Equality of
Variances
|
West for Equalityof Means
|
|
F
|
Sig.
|
t
|
df
|
Sig. (2-tailed)
|
Mean
Difference
|
Std. Error
Difference
|
95% Confidence Interval of the
Difference
|
|
Lower
|
Upper
|
|
math Equal variances
assumed
Equal variances not assumed
|
4.180
|
.041
|
-3.318
-4.011
|
1290
44.025
|
.001
.000
|
-3.1266
-3.1266
|
.9422
.7795
|
-4.9751
-4.6976
|
-1.2782
-1.5557
|