3.Calculate how much difference is expected, on average, between two sample means if:n₁= 4, n₂= 6, and the pooled variance is 60(MUST SHOW WORK FOR THIS PROBLEM).

Note: Assume the two samples were selected from the same population.

4.Calculate how much difference is expected, on average, between two sample means if: n₁= 12,n₂= 15, and the pooled variance is 60 (MUST SHOW WORK FOR THIS PROBLEM).

Note: Assume the two samples were selected fromthe same population.

5.As the same sizeincreases, the magnitude of the standard error ( ).

Note:Your responses for this questionshould either be increases,decreases,or remains constant.

(Fill in the blank to properly depict how sample size affects the magnitude of the standard error for the sample mean difference.)