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3 years ago

Assuming part a is correct, how do you do b and c?

Mathematics

1 answer:

zubka84 [21]3 years ago

8 0

Step-by-step explanation:

B. Yes, we are 99% confident that the population mean is within the interval.

C. Yes, 225 is below the interval minimum, so it is reasonable to conclude the average cholesterol level is greater than 225 mg/dl.

D. No. Increasing the sample size would decrease the margin of error, so the ends of the interval would move closer to the sample mean of 251.9. So the interval minimum would still be higher than 225.

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3 years ago

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3 years ago

In trapezoid WXYZ, identify WX. PLEASE HELP!!!

matrenka [14]

Answer:

The length of WX is 31 units.(third option)

Step-by-step explanation:

Given that In trapezoid WXYZ, WX║ZY and S and T are the mid points of the sides WZ and XY. We have to find the length of WX.

By trapezoid mid-segment Property,

A mid-segment of a trapezoid join the midpoints of the two non-parallel sides of trapezoid. The length of the mid-segment is the average of the lengths of the two bases and is parallel to the bases of the trapezoid.

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⇒ $96=WX+65$

⇒ $WX=96-65=31$

The length of WX is 31 units.(third option)

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3 years ago