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Delvig [45]
3 years ago
10

Staff from the school newspaper is taking a poll to find out how students in the school are going to vote in the upcoming electi

on for class president. Which group would best represent a sample population?
Every tenth student staying after school.
Every tenth student in the library at lunch.
Every tenth student in the main hallway between class.
Every tenth student in the student section at the school football game.
Mathematics
2 answers:
Sav [38]3 years ago
7 0

<u>Answer:</u>

The correct answer option is 'Every tenth student in the main hallway between class.'

<u>Step-by-step explanation:</u>

Every tenth student in the main hallway between class would best represent the sample population since majority of the students transit this hallway unlike the rest of the options.

For instance, polling every tenth student in the library at lunch would result in the favor of views of students who frequently visit the library and polling every tenth student in the student section at the school football game would go in favor of those who prefer sports.


icang [17]3 years ago
6 0

Answer:

C.

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago
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snow_tiger [21]
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3 years ago
what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed
kramer

Answer:

P(x \le 21) = 0.69146

Step-by-step explanation:

The missing parameters are:

n = 64 --- population

\mu = 20 --- population mean

\sigma = 16 -- population standard deviation

Required

P(x \le 21)

First, calculate the sample standard deviation

\sigma_x = \frac{\sigma}{\sqrt n}

\sigma_x = \frac{16}{\sqrt {64}}

\sigma_x = \frac{16}{8}

\sigma_x = 2

Next, calculate the sample mean \bar_x

\bar x = \mu

So:

\bar x = 20

So, we have:

\sigma_x = 2

\bar x = 20

x = 21

Calculate the z score

x = \frac{x - \mu}{\sigma}

x = \frac{21 - 20}{2}

x = \frac{1}{2}

x = 0.50

So, we have:

P(x \le 21) = P(z \le 0.50)

From the z table

P(z \le 0.50) = 0.69146

So:

P(x \le 21) = 0.69146

4 0
3 years ago
Simplify 4x + 8y - 3x + 2y
mezya [45]

Answer: 4x-3x, and 8y+2y. x+10y is the equation in simplest form.

Step-by-step explanation:

Step 1. You need to combine like terms:

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Hope I could help! :)

7 0
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X + y = 85
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x = 85 - y 
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<span>2y = 48 </span>
<span>y = 24 </span>
<span>x = 61</span>
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3 years ago
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