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ki77a [65]
3 years ago
13

What is the probability that five randomly selected students will have a mean score that is greater than the mean achieved by th

e students in the previous problem? (Round your answer to 4 decimal places.
Mathematics
1 answer:
katrin2010 [14]3 years ago
5 0

Answer:

the probability that five randomly selected students will have a mean score that is greater than the mean achieved by the students = 0.0096

Step-by-step explanation:

From the five randomly selected students ; 160, 175, 163, 149, 153

mean average of the students = 160+175+163+149+153/5

= mean = x-bar = 800/5

mean x-bar = 160

from probability distribution, P(x-bar > 160) = P[ x-bar - miu / SD > 160 -150.8 /3.94]

P( Z>2.34) = from normal Z-distribution table

= 0.0096419

= 0.0096

hence the probability that five randomly selected students will have a mean score that is greater than the mean achieved by the students = 0.0096

where SD = standard deviation = 3.94 and Miu = 150.8

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The percent decrease of an idem that dropped in price from 50 to 43 is
Genrish500 [490]

Answer:

-14.000000000000002

Step-by-step explanation:

DETAILED ANSWER:

A change from 50 to 43 represents a negative change (decrease) of -14.000000000000002%

Use the formula found below on this webpage to find the percent change by replacing the given values:

Percent change = [(New - Old ) / |Old|] x 100%

Percent change = [(43 - 50) / |50|] x 100 = [(-7) / 50] x 100 = -14.000000000000002 % (decrease)

Where: 50 is the old value and 43 is the new value. In this case we have a negative change (decrease) of -14.000000000000002 percent because the new value is smaller than the old value.

5 0
3 years ago
1. Determine the following:
vichka [17]

Answer:

v=d/t

v=340km/85km/h

v=4 km

I hope this helps you

3 0
3 years ago
A linear function has a slope of Negative StartFraction 7 Over 9 EndFraction and a y-intercept of 3. How does this function comp
Ede4ka [16]

The way that this linear function compares to y+11 is that It has the same slope and the same y-intercept.

<h3>What is a linear function?</h3>

This is the type of function that would produce a line when it is graphed out.

When we write out the equations in 1 and 2 we would see that they are basically the same type of equation. A linear equation is made up of the slope and the intercept.

Read more on linear equation here:

brainly.com/question/14323743

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3 0
2 years ago
I need to know the answer.
katrin [286]

Well, apologies if this is wrong but in my opinion, I think it's that The angles do not change. This is because the angles are alright staying in the same place. I don't understand much about angles but it makes the most sense to me.

5 0
3 years ago
Please help me solve either one will mark brainliest!! thank you!! Easy
RoseWind [281]

Answer:

A is A=2(1+2)a2

B is A≈208.18cm²

Step-by-step explanation:

A explanation is A=2(1+2)a2=2·(1+2)·102≈482.84271

B explanation is A=145(5+25)a2=14·5·(5+2·5)·112≈208.17777cm²

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3 years ago
Read 2 more answers
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