Answer:
Step-by-step explanation:
Given
----- variance
------------ sample
Required
Determine the S.E
The estimated standard error (S.E) for the sample mean is calculated using the following formula:
Where
So:
Hence: the estimated standard error for the sample mean is 2
Answer:
two significant figures
Step-by-step explanation:
Answer:
15.50x5+40.50x2 = $158.50
Step-by-step explanation:
She will buy 5 earrings and 2 pairs of necklaces
(15.50 x 5) + (40.50 x 2)
Hope this helps
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Answer:
x = 43.5 or x = 87/2
Step-by-step explanation:
(x - 3)2 = 81
2x - 6 = 81
2x = 87
x = 43.5
4(x+7)=38
4x + 28 = 38 - distribute the 4 into x and 7
4x = 10 - subtract 28 from both sides
x = 2.5 - divide both sides by 4 to get x by itself
answer - x = 2.5
