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Ghella [55]
3 years ago
9

PLEASE HELP MEEEEEEEEEEEEEEEEEEEEEEEEe

Mathematics
2 answers:
Natali5045456 [20]3 years ago
8 0

Answer:

-140 = x

Step-by-step explanation:

pychu [463]3 years ago
6 0

Answer:

-140 =x

Step-by-step explanation:

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Suppose that a study of elementary school students reports that the mean age at which children begin reading is 5.9 years with a
Bas_tet [7]

Answer:

5.9 years.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

In this question:

Mean of the population is \mu = 5.9

If a sampling distribution is created using samples of the ages at which 69 children begin reading, what would be the mean of the sampling distribution of sample means?

By the Central Limit Theorem, the same population mean, of 5.9 years.

3 0
3 years ago
Two riders are in a bike race. The second rider starts half an hour late but rides 4 miles per hour faster than the first rider.
Nesterboy [21]
The answer to this question is 20 mph and 24 mph
5 0
4 years ago
Which are the coordinates of the midpoint of JK with endpoints J(-7, -1) and K(13, -6)?
dsp73
The x coordinate of J is -7. The x coordinate of K is 13. The x coordinates add up to -7+13 = 6. Divide this result in half to get 6/2 = 3. Therefore, the midpoint has an x coordinate of 3.

The y coordinate of J is -1. The y coordinate of K is -6. The y coordinates add up to -1+(-6) = -7. Divide this result in half to get -7/2. Therefore, the midpoint has a y coordinate of -7/2.

This is why the final answer is choice D) (3, -7/2)
7 0
3 years ago
What is the area of this
Mariulka [41]
For this, you can use the formula for the area of a circle. The formula is pi*radius*radius

Look at this figure as 1/4 of a circle. You can do this because the measure of the angle of the corner is 90 degrees, and 90 is 1/4 of 360.

Since the radius of the full circle would be 10, the area would be pi*10*10=100pi

Since this figure is 1/4 of that, the area is 25pi.

Hope this helps!
7 0
3 years ago
Is this the right answer?
Ne4ueva [31]
Yes your answer is solved correctly
6 0
3 years ago
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