Question

A population has a mean µ = 6 and ∑x = 48. How many scores are in the population?

Answer 1

8

Explanation:

mean=(total)/(number of terms )

number of terms=total/mean=∑x/μ=48/6=8

Answer 2

8

Explanation:

Recall the formula for the population mean of a data set:

`\mu=(\sum x)/(N)`

We already know that μ is 6 and the sum is 48. Substitute:

`6=(48)/(N)`

Divide both sides by 48:

`(1)/(8)=(1)/(N)`

Reciprocal of both sides:

`N=8`

Thus, there are 8 scores in the population size.

And we're done!