Question

the mean of 20 numbers is 13. the new mean if each observation is increased by 5; is dash​

Answer 1

Answer:

278.

Step-by-step explanation:

mean of 20 numbers = 13.

total means of twenty numbers is = 20 * 13 = 260.

new mean = one

total means = 21.

total means of 21 numbers = 21*13 = 273.

and new mean is increased by 5.

then new mean is = 273+ 5. = 278.

Answer 2

Answer:

16.25

Step-by-step explanation:

we know that mean + sum / total observations

now 13 = sum/20

therefore sum of these 13 numbers is 13 x 20 = 260

each number is increased by 5 then total increase in numbers  = 13 x 5= 65

therefore new sum is 260+65 = 325

but total observations remain same = 20

∴ new mean = 325/20 = 16.25

 hope my answer helped you