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2 years ago

Which statement proves that quadrilateral uwxy is a parallelogram.

SAT

1 answer:

Tanya [424]2 years ago

4 0

Parallelograms are shapes that have 4 sides, where the opposite sides are congruent and parallel

<h3>How to determine a parallelogram</h3>

For a shape to be a parallelogram, then the following must be true

The opposite side lengths are congruent
The opposite side lengths are parallel
The diagonals bisect each other

<h3>The proof statement</h3>

The above statements in (a) above mean that:

The statements that prove that quadrilateral uwxy is a parallelogram are

Diagonals UX and WY bisect each other
Sides UW and XY are congruent
Sides UW and XY are parallel.

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2 years ago

Which statements are true of the victorian time period? check all that apply.

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Statements that are true of the victorian time period are;

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3 years ago

To compare the average amount of time that canadians and americans spend commuting, a researcher collects a sample of canadians

yKpoI14uk [10]

The standard error of the difference of sample means is 0.444

From the complete question, we have the following parameters

<u>Canadians</u>

Sample size = 50
Mean = 4.6
Standard deviation = 2.9

<u>Americans</u>

Sample size = 60
Mean = 5.2
Standard deviation = 1.3

The standard error of a sample is the quotient of the standard deviation and the square root of the sample size.

This is represented as:

$SE = \frac{\sigma}{\sqrt n}$

The standard error of the Canadian sample is:

$SE_1 = \frac{2.9}{\sqrt{50}}$

So, we have:

$SE_1 = 0.41$

The standard error of the American sample is:

$SE_2 = \frac{1.3}{\sqrt{60}}$

So, we have:

$SE_2 = 0.17$

The standard error of the difference of sample means is then calculated as:

$SE= \sqrt{SE_1^2 + SE_2^2}$

This gives

$SE= \sqrt{0.41^2 + 0.17^2}$

$SE= \sqrt{0.197}$

Take square roots

$SE= 0.444$

Hence, the standard error of the difference of sample means is 0.444