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e-lub [12.9K]
3 years ago
7

Plsss help will mark brainliest

Mathematics
2 answers:
Nataliya [291]3 years ago
8 0
The correct one is letter c
DiKsa [7]3 years ago
3 0
C, because 7 divided, or over nine, is 7/9
Hope this helps!
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What is an equation that models the sequence 400, 200, 100, 50, ?
katrin [286]
N / 2

400 / 2 = 200
200 / 2 = 100
100 / 2 = 50
50 / 2 = 25
25 / 2 = 12.5
4 0
3 years ago
A sample with a mean of m = 40 and a variance of s2 = 20 has an estimated standard error of 1 point. how many scores are in the
tamaranim1 [39]

The correct option is 20.

The score found for the sample is 20.

<h3>What is Standard error?</h3>

A standard error is a statistic that is applied to test the distribution of data. This metric is comparable to standard deviation. We can calculate the standard error if we know the sample size & standard deviation. It assesses the mean's precision.

Now, according to the question;

Sample mean; \bar{x}=40

Sample variance; s^{2}=20

Thus, s=\sqrt{20}=4.47

Standard error SE = 1

The amount of scores with in sample must be determined here.

The standard error formula is as follows:

S E=\frac{s}{\sqrt{n}}

We might rearrange the formula as follows:

\begin{aligned}\sqrt{n} &=\frac{s}{S E} \\n &=\left(\frac{s}{S E}\right)^{2}\end{aligned}

Substituting the values;

\begin{aligned}&n=\left(\frac{4.47}{1}\right)^{2} \\&n=19.98\end{aligned}

The sample's number of scores n = 19.98 = 20 (round up)

Therefore, the scores are in the sample is 20.

To know more about the Standard error, here

brainly.com/question/14467769

#SPJ4

3 0
1 year ago
<img src="https://tex.z-dn.net/?f=2a%20%3D%204a%20%2B%2022" id="TexFormula1" title="2a = 4a + 22" alt="2a = 4a + 22" align="absm
Vera_Pavlovna [14]
A is -11
Is that what you're trying to find
7 0
3 years ago
Read 2 more answers
PLEASE HELP! ASAP!! 25 POINTS
brilliants [131]

Answer:

25 Points

Step-by-step explanation:

That the only number

6 0
3 years ago
Can someone answer the latest question on my profile​
Morgarella [4.7K]

Answer:

I will take a look

Step-by-step explanation:

please mark me brainliest here ;)

4 0
3 years ago
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