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ehidna [41]
3 years ago
12

How do u find the mean

Mathematics
2 answers:
dusya [7]3 years ago
7 0
You add all the numbers & divide it by how many numbers 8 +9+9+9+10+10
alexgriva [62]3 years ago
7 0

<em>Answer,</em>

<em>The mean is the average of the numbers.  It's quite simple to find the mean. All you do is, add all the numbers togter & divide by how many numbers there are.</em><em><u> In simpler words, it is the sum divided by the count.</u></em>

<em>I'm not sure if you are trying to find the mean for only one row or all the rows together but, I will show you how to do it for all the numbers. </em>

<em>The mean of the numbers is, </em><em>12.47619047619.</em>

<em>Explanation, </em><em>8+9+9+9+10+10+11+11+12+12+12+12+13+13+13+14+14+15+15+16+24= 262.</em>

<em>Then we divide </em><em>262</em><em> by how many numbers there are, </em><em>21</em><em>. Then we get </em><em>12.47619047619.</em>


<em><u>Hope this helps :-)</u></em>



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KonstantinChe [14]

Answer:

The answer is c

Step-by-step explanation:

5x+3y=19

multiply x 2: 10x+6y=38

2x-4y=-8

multiply by -5: -10x+20y=40

now you can add the two equations:

                    10x+6y=38

                    -10x+20y=40

add equations 0x+26y=78

                               Y=3

8 0
3 years ago
Plz answer correctly and thank you
Alex777 [14]

Answer:

83

Step-by-step explanation:

get rid of decimals and become 2988/36

divide and get 83

7 0
3 years ago
What is the value of x in the equation x – y = 30, when y = 15?
wariber [46]

The answer is equal to a


8 0
3 years ago
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When you roll a number cube, there are 6 possible _____.
IgorLugansk [536]
The correct answer is C, outcomes
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3 years ago
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Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.42 and a standard deviation of 1.52.
Roman55 [17]

Answer:

The percentage of the women have size shoes that are greater than

9.94 is 16%

Step-by-step explanation:

* <em>Lets revise the empirical rule</em>

- The Empirical Rule states that almost all data lies within 3  standard

  deviations of the mean for a normal distribution.  

- 68% of the data falls within one standard deviation.  

- 95% of the data lies within two standard deviations.  

- 99.7% of the data lies Within three standard deviations  

* <em>The empirical rule shows that</em>

# 68% falls within the first standard deviation (µ ± σ)

# 95% within the first two standard deviations (µ ± 2σ)

# 99.7% within the first three standard deviations (µ ± 3σ).

* <em>Lets solve the problem</em>

- The shoe sizes of American women have a bell-shaped distribution

  with a mean of 8.42 and a standard deviation of 1.52

∴ μ = 8.42

- The standard deviation is 1.52

∴ σ = 1.52

- <u><em>One standard deviation (µ ± σ):</em></u>

∵ (8.42 - 1.52) = 6.9

∵ (8.42 + 1.52) = 9.94

- <u><em>Two standard deviations (µ ± 2σ):</em></u>

∵ (8.42 - 2×1.52) = (8.42 - 3.04) = 5.38

∵ (8.42 + 2×1.52) = (8.42 + 3.04) = 11.46

- <u><em>Three standard deviations (µ ± 3σ):  </em></u>

∵ (8.42 - 3×1.52) = (8.42 - 4.56) = 3.86

∵ (8.42 + 3×1.52) = (8.42 + 4.56) = 12.98

- <em>We need to find the percent of American women have shoe sizes </em>

<em>   that are greater than 9.94</em>

∵ The empirical rule shows that 68% of the distribution lies  

  within one standard deviation in this case, from 6.9 to 9.94

∵ We need the percentage of greater than 9.94

- <em>That means we need the area under the cure which represents more</em>

<em>   than one standard deviation (more than 68%)</em>

∵ The total area of the curve is 100% and the area within one standard

  deviation is 68%

∴ The area greater than one standard deviation = (100 - 68)/2 = 16

∴ The percentage of the women have size shoes that are greater

   than 9.94 is 16%

8 0
3 years ago
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