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2 years ago

Dawn is to Noon as Dusk is to

SAT

2 answers:

WARRIOR [948]2 years ago

7 0

Answer:

Dawn is to noon as dusk is to dark

Explanation:

Dawn is like 6 am, then to like 12 pm (noon), and dusk is like 4, 5, 6 pm, and then dark is a like around midnight

Mariulka [41]2 years ago

3 0

Answer:

dark

Explanation:

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2 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

Canadians

Sample size = 50
Mean = 4.6
Standard deviation = 2.9

Americans

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