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Thepotemich [5.8K]
3 years ago
14

Suppose that 65\ee, percent of the 310{,}000310,000310, comma, 000 citizens in a county are registered to vote. A not-for-profit

organization takes an SRS of 100100100 of these citizens and finds that 67\gg, percent of those sampled are registered to vote. The organization plans on taking repeated samples like this. What are the mean and standard deviation of the sampling distribution of the proportion of citizens who are registered to vote
Mathematics
1 answer:
ikadub [295]3 years ago
5 0

Answer:

mean= 0.65

standard deviation=\sqrt{\frac{0.65(0.35)}{100}

Step-by-step explanation:

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The answer is 4.7
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4 0
3 years ago
Read 2 more answers
A playground is shaped like a quaderaleteral with all sides 27 feet long, with two angles measures of 65 degrees and two angles
Ksivusya [100]

Answer:

Rhombus

Step-by-step explanation:

Shape of a playground is a quadrilateral

It is given that  all sides of a quadrilateral are= 27 feet

Since all the sides of a quadrilateral are equal that it can be either a rhombus or it can be a square

Two angle are 65° each

And other two angers are 115° each

65°+ 115°= 180°

It forms a co-interior angle

Hence the quadrilateral is a parallelogram

Since all the four sides of parallelogram are equal, than the given figure must be rhombus

Hence, geomatric shape best describes the shape of the playground is Rhombus.

7 0
3 years ago
Logan earned $8 for each dog he walked last summer. This summer, he raised his fee to $9 per dog. Express the change in Logan’s
hammer [34]

Answer:

The fee increased 12.5%

Step-by-step explanation:

The new price is 9 and the old price is 8, so you can find the change by doing

9/8

which is 1.125

This means the new price is 12.5% higher than last year because you have to ignore the 1 in front and only look at the .125

Move the decimal place two to the right to get 12.5 and then add the % sign.

5 0
3 years ago
In triangle ABC, m∠A = 36°, m∠B = 84°, and m∠C = 60°.
professor190 [17]

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8 0
3 years ago
A bag contains 4 red marbles, 8 blue marbles and 2 green marbles. If two marbles are drawn out of the bag, what is the probabili
mina [271]

Answer:

The probability, to the nearest 10th of a percent, that both marbles drawn will be red is 28.5%

Step-by-step explanation:

Number of red marbles = 4

Number of blue marbles = 8

Number of Green marbles = 2

Total number of marbles = 4+8+2 =14

We need to find the probability, to the nearest 10th of a percent, that both marbles drawn will be red?

The formula used will be: Probability=\frac{Number\:of\:favourable\:outcomes}{Number\:of\;possible\:outcomes}\\

In our case, Number of favourable outcomes = 4 (as red marbles are drawn)

Number of possible outcome = 14 (Total number of marbles)

The probability will be:

Probability=\frac{Number\:of\:favourable\:outcomes}{Number\:of\;possible\:outcomes}\\\\Probability=\frac{4}{14}\\ Probability=0.2857\\

Now, calculating nearest 10th of a percent

Probability = 0.2857*100\\Probability=28.5%

So, the probability, to the nearest 10th of a percent, that both marbles drawn will be red is 28.5%

5 0
3 years ago
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