Question

1.) Suppose we have a normally distributed population of scores
with mean 150 and standard deviation 52. We know the
**standard error** of the mean is 4. What is the value
of the sample size?

2.) Suppose we have a normally distributed population of scores
with mean 300 and standard deviation 45. We know the
**standard error** is 3. What is the value of the
sample size?

Answer #1

1) Here Given mean ( ) = 150

Standard deviation () = 52

Standard error (E ) = 4

We know that Standard error (E ) = = 4

take the square on bot sides, then

**The value of sample size (n ) = 169**

2)

Here Given mean ( ) = 300

Standard deviation () = 45

Standard error (E ) = 3

We know that Standard error (E ) =

take the square on bot sides, then

**The value of sample size (n ) = 225**

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