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n200080 [17]
3 years ago
12

In a particular year, the mean score on the ACT test was 19.6 and the standard deviation was 5.2. The mean score on the SAT math

ematics test was 546 and the standard deviation was 126. The distributions of both scores were approximately bell-shaped. Round the answers to at least two decimal placesFind the z-score for an ACT score of 26. The Z-score for an ACT score of 26 is ______ .
Mathematics
1 answer:
olganol [36]3 years ago
4 0

Answer:

0.11

Step-by-step explanation:

Let the random variable score, X = 26; mean, ∪ = 19.6; standard deviation, α = 5.2

By comparing P(0≤ Z ≤ 26)

P(Z ≤ X - ∪/α) = P(Z ≤ 26 - 19.6/5.2)

= P(Z ≤ 1.231)

Using Table: P(0 ≤ Z ≤ 1) = 0.39

P(Z > 1) = (0.5 - 0.39) = 0.11

∴ P(Z > 26) = 0.11

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Make and equation for the number 12
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Answer:

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Step-by-step explanation:

-6 + x = 6

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A formula for finding SA, the surface area of a rectangular prism, is
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Step-by-step explanation:

SA=2*(12*6+12*4+6*4)

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3 years ago
Help me please i do not understand it.
sergij07 [2.7K]
Answer:y = 2x + 4

Explanation:

1) The slope - intercept form is of the kind y = mx + b, where m is the slope and b is the y-intercept.

2) Given two points you can find the slope (using the two points) and then the equation using one of the points.

3) slope = m = Δy / Δx

points given (3,10) , (0,4)

m = [y2 - y1] / [x2 - x1] = [10 - 4] / [3 - 0] = 6 / 3 = 2

4) equation

y - y2
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---------- = 2
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=> y - 4 = 2 (x - 0)

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3 0
3 years ago
The table shows the number of games a chess player won in professional competitions, based on the number of games played.
AfilCa [17]

slope  = (25-4)/(30-10)

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slope =21/20  

using point slope form

y-y1 = m(x-x1)

y-4 = 21/20 (x-10)

y = 21/20x -21/2 +4

y = 21/20 x -21/2 +8/2

y = 21/20x -13/2


let x=40

y = 21/20 (40) -13/2

y = 42-13/2

y = 35.5 games


If we round the slope to 1

slope =1

using point slope form

y-y1 = m(x-x1)

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y = 1x -10 +4

y =  x -6


let x=40

y = 40-6

y = 34 games


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3 years ago
Simplify the ratio 24:81
gizmo_the_mogwai [7]

Answer:

8 to 27

Step-by-step explanation:

3 0
2 years ago
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