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Shtirlitz [24]
3 years ago
15

According to the empirical rule, if the data form a "bell-shaped" normal distribution, ________ percent of the observations will

be contained within 2 standard deviations around the arithmetic mean.

Mathematics
1 answer:
jekas [21]3 years ago
5 0
According to empirical rule, the area under the normal distribution or "bell-shaped curve", when plotted as a function of the z-parameter can be defined in terms of percentages.
The z-parameter (or z-score) is defined as
z= \frac{x- \mu }{ \sigma }
where
x =  value of random variable,
μ = the mean,
σ = standard deviation,

The total area under the curve = 1.
The curve below shows that within 2 standard deviations from the mean, the total area under the curve is 95%  of the total area.



Answer: 95%

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puteri [66]

Answer:

Read Below

Step-by-step explanation:

we can represent a function using a graph. Graphs display many input-output pairs in a small space. The visual information they provide often makes relationships easier to understand. We typically construct graphs with the input values along the horizontal axis and the output values along the vertical axis.

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3 0
2 years ago
Find the difference.<br> 5wx2 - 2wx2<br><br> A. 3 <br> B. 2wx2 <br> C. 3wx2 <br> D. 4wx2
scoray [572]
5wx2-2wx2 :

5-2 wx2

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Answer C

hope this helps!
7 0
3 years ago
What is (-7/8)(-3/4) simplified
Snowcat [4.5K]

Answer:

<h2>21/32</h2>

Step-by-step explanation:

-7/8 × -3/4 = 21/32

-7 × -3   = 21  

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21/32

<u><em>IMPORTANT: This number is not negative, because a negative times a negative is a positive.</em></u>

By the way, if you didn't know how to arrive at the fraction here's how.

First, Address input parameters & values.

Input parameters & values: The decimal number = 0.65625. Then, write it as a fraction

0.65625/1

Multiply by 100000 both the numerator & denominator

(0.65625 x 100000)/(1 x 100000) = 65625/100000

65.625% = 65.625/100 or 65625/100000

Find LCM (Least Common Multiple) for 65625 & 100000.

3125 is the LCM for 65625 & 100000

Divide by 3125

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I'm always happy to help :)

7 0
3 years ago
Read 2 more answers
23454793142528293623939303905058585838385
Tomtit [17]
Yes this is the best kind of question
4 0
3 years ago
Read 2 more answers
Will give brainliest to whoever replies with the correct answer. (Question is in the image)
EastWind [94]

Answer:x = 7

Step-by-step explanation:

Similar figures have sides that are proportional.  Setting up a proportion for the sides of the figures will help solve for 'x':

Cross-multiply:  3(x + 1) = 6(x - 3)

Distribute:  3x + 3 = 6x - 18

Combine like terms:  21 = 3x

Solve for 'x':  x = 7

5 0
3 years ago
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