The standard error of is the . Group of answer choices variance of variance of the sampling distribution of standard deviation of the sampling distribution of difference between the two means

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

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