Answer:
See explanation below
Step-by-step explanation:
Since each time after the person gets off the scale, the reading is 2 lb the person's weight must be near the mean of
148-2, 151-2, 150-2, 152-2; that is to say, near the mean of 146, 149, 148, 150 = (146+149+148+150)/4 = 148.25
We could estimate the uncertainty as <em>the standard error SE
</em>
where
<em>s = standard deviation of the sample
</em>
<em>n = 4 sample size.
</em>
Computing s:
So, the uncertainty is 1.479/2 = 0.736
<em>It is not possible to estimate the bias, since it is the difference between the true weight and the mean, but we do not know the true weight.
</em>
Answer:
31
Step-by-step explanation:
Multiply the numbers 7 * 4, which gets your 28.
= 28+6-12/4
Divide the numbers 12/4, which gets you 3
=28+6-3
Add/Subtract the numbers 28+6-3
= 31
Answer:-
So if ur question merely includes addition and subtraction operations then it’s “32”
Answer:
Last one
Step-by-step explanation:
D. 3 and 9
(Also 12 which isn’t in the options)
3:1,3
9:1,3,9
12:1,2,3,4,6,12