For a biology lab experiment, you have to randomly select four mice. the mice to be chosen come from a population bred to weigh 30 grams, give or take 5 grams or so. the total weight t of the four mice will grams, give or grams or so. use the pythagorean property of standard errors.

120; 10

Step-by-step explanation:

The total weight T of the four mice is simply the sum of each individual weight, assuming the mean value as true:

Pythagorean property of standard errors assumes that:

Therefore, the standard error of the total weight is:

The total weight T of the four mice will be 120 grams, give or take 10 grams or so.

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

you can't solve x because it is 2 linear equation and you only have one equation