a picture is 5 inches by 7 inches. there is a frame around the picture that is of uniform width. the area of the frame and the p
1 answer:
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Answer: The standard error of the mean = 0.5
Step-by-step explanation:
Given : Sample size : n = 144
Standard deviation :
The formula to find the standard error of the mean is given by :-
i.e.
Hence, the standard error of the mean =0.5
Answer: Choice B)
We have some value m and we're squaring it to get
To undo this and isolate m, we apply the square root to both sides
There are two solutions here. This is similar to how there are two solutions in something like (those two solutions being x = 5 and x = -5). Squaring any negative number leads to a positive result because
negative times negative = positive.