Betreft opdracht 3.1 One-way herhaalde-metingen-ANOVA vraag 8: Wat zijn de gemiddelde sportscores op de drie meetmomenten en hun standaarddeviaties?
Het antwoord van SPSS komt niet overeen met de gemiddelden en standaarddeviaties uit R. Hoe kan dit? Heb ik het verkeerde commando gebruikt? Hieronder de uitwerking in R:
1
E METING:
> descr(dat$Zsportscore1);
###### Descriptives for dat$Zsportscore1
Describing the central tendency:
mean median mode 95% CI mean
5.868e-16 -0.3772 -0.3772 [-0.19; 0.19]
Describing the spread:
var sd iqr se
1 1 1.018 0.09623
Describing the range:
min q1 q3 max
-1.395 -1.395 0.6412 1.659
Describing the distribution shape:
skewness kurtosis dip
0.1595 -0.965 0.1435
Describing the sample size:
total NA. valid
108 0 108
2E METING:
> descr(dat$Zsportscore2);
###### Descriptives for dat$Zsportscore2
Describing the central tendency:
mean median mode 95% CI mean
1.02e-15 -0.1105 -0.5368 [-0.19; 0.19]
Describing the spread:
var sd iqr se
1 1 1.279 0.09623
Describing the range:
min q1 q3 max
-1.389 -0.5368 0.7421 2.021
Describing the distribution shape:
skewness kurtosis dip
0.3012 -0.7956 0.125
Describing the sample size:
total NA. valid
108 0 108
3E METING:
###### Descriptives for dat$Zsportscore3
Describing the central tendency:
mean median mode 95% CI mean
-1.016e-15 -0.03559 -0.03559 [-0.19; 0.19]
Describing the spread:
var sd iqr se
1 1 1.922 0.09623
Describing the range:
min q1 q3 max
-1.958 -0.9966 0.9254 1.886
Describing the distribution shape:
skewness kurtosis dip
0.3814 -0.6545 0.162
Describing the sample size:
total NA. valid
108 0 108