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2 years ago

CAN SOMEONE PLEASE HELP, I DON'T WANT TO FAIL

1 answer:

7 0

Matthew sells tickets for a school lottery at 3$/each. He wants to know how much profits he will make according to the number of tickets sold knowing that he starts with 2$.

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bearhunter [10]

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2 years ago

Read 2 more answers

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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1 year ago

Based on the sign of the standard cell potential, ????∘cell, classify these reactions as spontaneous or nonspontaneous as writte

Ratling [72]

For a cell reaction to be sponteanous, the standard cell potential must be positive.

<h3>What is a sponteanous cell reaction?</h3>

We define a cell reaction as sponteanous when the value of the standard cell potential is positive. If the standard cell potential is negative then the reaction is not sponteanous.

The question here is incompete but we know that the reactions that are sponteanous will all have a positive standard cell potential.

Learn more about standard cell potential : brainly.com/question/15289741

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1 year ago

In a recent poll of 1000 adults, 55% of the respondents said that the use of marijuana should not be made legal. In the same pol

Stella [2.4K]

Answer: no answer

Explanation: I dont know what exactly the question regarding the problem is.

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2 years ago

In this assignment you will read about artificial blood and blood donations. you will then use what you learned to answer a few

NNADVOKAT [17]

Blood donation occurs when blood is drawn voluntary from an individual for transfusion.

<h3>What is Transfusion?</h3>

This is the process of donating blood to an individual and is usually done intravenously.

Before blood donation takes place , necessary tests are usually done to prevent infection and ensure the blood types match to prevent coagulation and death.

Read more about Blood donation here brainly.com/question/13926051

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1 year ago