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Ivenika [448]
3 years ago
6

I need the answer ASAP please

Mathematics
1 answer:
ANTONII [103]3 years ago
3 0
Ok bare with me here.
I’m not sure if you filled in the minimum medium and max but I’m going to try and lay this out.
Min: 3
Q1: 7.5
Med: 9
Q2: 13
Max: 17

I hope this helps!! It should get you through the problem!
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33. Suppose that the scores on a statewide standardized test are normally distributed with a mean of 78 and a standard deviation
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Given the scores on a statewide standardized test are normally distributed

Mean = μ = 78

Standard deviation = σ = 3

Normalize the data using the z-score by using the following formula and chart:

z=\frac{x-\mu}{\sigma}

Estimate the percentage of scores of the following cases:

(a) between 75 and 81

so, the z-score for the given numbers will be:

\begin{gathered} 75\rightarrow z=\frac{75-78}{3}=\frac{-3}{3}=-1 \\ 81\rightarrow z=\frac{81-78}{3}=\frac{3}{3}=1 \end{gathered}

As shown, the percentage when (-1 < z < 1) = 68%

(b) above 87

87\rightarrow z=\frac{87-78}{3}=\frac{9}{3}=3

The percentage when (z > 3) = 0.5%

(c) below 72

72\rightarrow z=\frac{72-78}{3}=\frac{-6}{3}=-2

The percentage when (z < -2) = 0.5 + 2 = 2.5%

(d) between 75 and 84

\begin{gathered} 75\rightarrow z=\frac{75-78}{3}=-\frac{3}{3}=-1 \\ 84\rightarrow z=\frac{84-78}{3}=\frac{6}{3}=2 \end{gathered}

The percentage when ( -1 < z < 2 ) = 68 + 13.5 = 81.5%

3 0
1 year ago
bruno is digging a rectangular hole. the area of the rectangle is 10 square feet. bruno digs 3 feet dow.what is the volume ​
djverab [1.8K]

30 ft^3. If the area is 10 the the length is 5 and width is 2. If the height is 3 then it is 3 x 5 x 2 = 30ft^3

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3 years ago
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Nuetrik [128]

Answer:

x = 74

Step-by-step explanation:

2 * x + 19 = 167

2x + 19 = 167

So we have to subtract 19 from both sides

2x = 148

Divide both sides by 2

x = 74

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Try adding a picture next time maybe...?

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Just add 4+12 which equals 16 and divide by 2 to get the average.
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