Respuesta :
Answer:
[tex]\bar X = \frac{8+11+17+7+19}{5}= 12.4[/tex]
And the can be founded with this formula:
[tex] s = \sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}[/tex]
[tex] s = \sqrt{\frac{(8-12.4)^2 +(11-12.4)^2 +(17-12.4)^2 +(7-12.4)^2 +(19-12.4)^2}{5-1}} =5.367[/tex]
And rounded to the nearest tenth we got [tex] s= 5.4[/tex]
Step-by-step explanation:
For this case we have the following data given:
8, 11, 17, 7, 19
The first step is calculate the sample mean with this formula:
[tex]\bar X = \frac{\sum_{i=1}^n X_i}{n}[/tex]
And replacing we got:
[tex]\bar X = \frac{8+11+17+7+19}{5}= 12.4[/tex]
And the deviation can be founded with this formula:
[tex] s = \sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}[/tex]
And replacing we got:
[tex] s = \sqrt{\frac{(8-12.4)^2 +(11-12.4)^2 +(17-12.4)^2 +(7-12.4)^2 +(19-12.4)^2}{5-1}} =5.367[/tex]
And rounded to the nearest tenth we got [tex] s= 5.4[/tex]
Answer:
Average Age 12.4
Variance 23
Step-by-step explanation:
I got it wrong and this was the answer on Khan Academy
