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fomenos
2 years ago
10

WILL GIVE BRAILIEST PLZZZZ HELP MEEEEEE

Mathematics
2 answers:
vredina [299]2 years ago
6 0

The median of the group that did not study is less than 80.

also

In general, those students that studied scored much higher than those students that did not study.

Irina18 [472]2 years ago
5 0

Answer:

In general, those students that studied scored much higher than those students that did not study.

Step-by-step explanation:

Hope this helps.

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Solve for the indicated variable.<br><br> y = mx + b for x<br><br> x=
kogti [31]

Answer:

y-b/m = x

Step-by-step explanation:

y = mx + b

~Subtract b to both sides

y - b = mx

~Divide m to both sides

y-b/m = x

Best of Luck!

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3 years ago
What is an orgasim? I really dont know
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Step-by-step explanation:

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3 years ago
The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first deter
VMariaS [17]

Answer:

He must survey 123 adults.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

Assume that a recent survey suggests that about 87​% of adults have heard of the brand.

This means that \pi = 0.87

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

How many adults must he survey in order to be 90​% confident that his estimate is within five percentage points of the true population​ percentage?

This is n for which M = 0.05. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.05 = 1.645\sqrt{\frac{0.87*0.13}{n}}

0.05\sqrt{n} = 1.645\sqrt{0.87*0.13}

\sqrt{n} = \frac{1.645\sqrt{0.87*0.13}}{0.05}

(\sqrt{n})^2 = (\frac{1.645\sqrt{0.87*0.13}}{0.05})^2

n = 122.4

Rounding up:

He must survey 123 adults.

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3 years ago
Amanda decided to save the money that she earned babysitting to buy school clothes. Amanda wants to buy two pairs of jeans that
Sati [7]

Answer:

i don't know

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Can anyone help I'm I don't know what to do HELPP ME W/ MY HW PLEASEE
antiseptic1488 [7]
Fifi gets 1 cup.
And Honey's weight is 50 pounds.

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3 years ago
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