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3 years ago

7

You are less likely to see a total solar eclipse than a total lunar eclipse because

1 answer:

Evgesh-ka [11]3 years ago

6 0

I think the answer is d. the moon's umbra only covers a small area on earths surface.

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What is the facific ring of fire?

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Answer:

Pacific ring of fire is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.

Explanation:

The spelling of the Pacific is wrong.

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3 years ago

Aside from a student ID what is another card for college student can use to obtain discounts

MissTica

Student Advantage card

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2 years ago

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Uh this is for science so can yall help

Ilia_Sergeevich [38]

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3 years ago

What are three good health practices children need for a lifetime?

QveST [7]

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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

<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

Read more about standard errors at:

brainly.com/question/6851971

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2 years ago