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2 years ago

What can scientists learn from magnetic striping patterns.

SAT

1 answer:

patriot [66]2 years ago

3 0

Answer:

the cause of magnetic pole reversals

Explanation:

i hope this hels G

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How much force is required to accelerate a 5 kg mass at 20 M/s2

solmaris [256]

Answer:

100N

Explanation:

m= 5kg

a= 20 m/s^2

F= ma = 5kg x 20 m/s^2 = 100kg m/s^2 = 100N

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3 years ago

Use finite differences to determine the degree of the polynomial

dybincka [34]

Answer:

Step-by-step explanation:

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2 years ago

The social worker is responsible for helping clients .

nordsb [41]

"Social workers are responsible for helping individuals, families, and groups of people to cope with problems they're facing to improve their patients' lives." https://mswonlineprograms.org/job-duties-and-responsibilities-of-social-workers/

If you use this answer make sure to use quotation marks and include your source.

6 0

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