Question

the mean of the observation : a + 2, a + 3, a + 4, a - 2 is​

Answer 1

Answer:

a + 7/4

Step-by-step explanation:

(a + 2 + a + 3 + a +4 + a - 2)/4

(4a + 7)/4

= a + 7/4

Answer 2

Mean of the observation will be sum of all observation divided by number of observations.

Thus, we can say that :

$Mean=\frac{a+2+a+3+a+4+a-2}{4}$

$=\frac{4a+7}{4}$

$=a+\frac{7}{4}$