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NikAS [45]
3 years ago
14

Sample annual salaries (in thousands of dollars) for public elementary school teachers are listed. Find the sample standard devi

ation. Round to two decimal places if necessary
23.9
15.3
40.2
30.3
21.0
22.8
ID: ES6L 2.4.1-9+
Mathematics
1 answer:
faust18 [17]3 years ago
7 0

Answer:

The standard deviation is 9.34

Step-by-step explanation:

First we need to find mean of the sample:

m=(23.9+15.3+40.2+30.3+12+22.8)/6=24.08

Standard deviation will be like below:

d=\sqrt{(x-m^2)/6}=9.34

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Why is y=-12.5x have a proportional relationship
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Answer:

A proportional relationship is any relationship that stays constant. since both sides of the equation do not change, this is a proportional relationship

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3 years ago
True or false ? The polynomial below is a perfect square trinomial of the form A2-2AB+B2 4x2-16x+16
Vlad1618 [11]
True

4x^2 -16x +16 = (2x -4)^2

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3 0
3 years ago
Find the geometric mean between 6 and 15<br><br> No decimals.
SVEN [57.7K]
Answer: it’s a decimal 9.5

Hope this helped!
8 0
3 years ago
The following describes a sample. The information given includes the five number summary, the sample size, and the largest and s
lys-0071 [83]

Answer:

L= Q_1 - 1.5*IQR = 210 -1.5*40 =150

U= Q_3 + 1.5*IQR = 250 +1.5*40 =310

And if we analyze the info provided we have 500 values

Tails: 160,165,167,171,175,...,268,269,269,269,270,270

So as we can see on the tails any values is <150 or >310 so then for this case we cannot consider as outliers any of the values on the tails of the distribution.

Step-by-step explanation:

For this case we have the 5 number summary

(160,210,220,250,270)

So then we have:

minimum = 160 , Q1 = 210, Q2= Median=220, Q3 = 250, Max=270

If we find the interquartile range we got:

IQR = Q_3 -Q_1 = 250-210 =40

For this case we need to find the lower and upper limit with the following formulas:

L= Q_1 - 1.5*IQR = 210 -1.5*40 =150

U= Q_3 + 1.5*IQR = 250 +1.5*40 =310

And if we analyze the info provided we have 500 values

Tails: 160,165,167,171,175,...,268,269,269,269,270,270

So as we can see on the tails any values is <150 or >310 so then for this case we cannot consider as outliers any of the values on the tails of the distribution.

4 0
4 years ago
Solve the equation -12 = f/0.2 (Thats a fraction)
Shalnov [3]
-12 = f/0.2

First, we can start out by making our goal to get the variable (f) on one side of the problem by itself. To do this, multiply both sides by 0.2. 
-12 \times 0.2 = f

Second, our next step is to multiply -12 times 0.2. This can be solved in your head, on a piece of paper, on a calculator, etc. (-12 times 0.2 = 2.4).
-2.4 = f

Third, our last step will be to switch sides. Basically flip the problem.
f = -2.4

Answer: \fbox {x = -2.4}
8 0
4 years ago
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