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pashok25 [27]
3 years ago
12

Please help me simplify this! I have no idea how to solve this question! Thank you if you do!

Mathematics
1 answer:
rjkz [21]3 years ago
6 0
You go it right it's the first one
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Suppose a normal distribution has a mean of 62 and a standard deviation of
Alekssandra [29.7K]

The probability that a data value is between 54 and 66 is 81.9%

z score is used to determine by how many standard deviations the raw score is above or below the mean.

The z score is given by:

z = \frac{x-\mu}{\sigma} \\\\where\ x=raw\ score,\mu=mean,\sigma=standard\ deviation

Given that μ = 62, σ = 4

For x = 54:

z=\frac{54-62}{4}=-2

For x = 66:

z=\frac{66-62}{4}=1

P(54 < x < 66) = P(-2 < z < 1) = P(z < 1) - P(z < -2) = 0.8413 - 0.0228 = 81.9%

The probability that a data value is between 54 and 66 is 81.9%

Find out more on z score at: brainly.com/question/25638875

3 0
2 years ago
Hector has three weeks before his first track meet he recorded the amount of time he spent running during week 1 of his training
Fofino [41]
Add them all up so 2 6/12 and 1 6/12 is 4 and then add 1 9/12 to get 5 9/12 or in simple form 5 3/4
6 0
4 years ago
-2x+3y=-12 2x+y=4 After adding the two equations to eliminate x you are left with 4y=-8 solve for y
natita [175]

-2x+3y=-12 2x+y=4

add together

4y = -8

divide by 4

y = -2


3 0
3 years ago
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What is 2/3 times 1 whole
VMariaS [17]

Answer:

2/3

Step-by-step explanation:

2/3 times 1 is 2/3 of 1

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I need help with this question can some please help me !
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Answer:

you just shoed the answers

Step-by-step explanation:

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