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muminat
4 years ago
7

Population of scores has μ = 50 and σ = 12. if you subtract five points from every score in the population, then the new standar

d deviation will be _____.
Mathematics
1 answer:
Alinara [238K]4 years ago
6 0
<span>The mean of the sample is 50 and the standard deviation is 12. If 5 is subtracted from each of the values the standard deviation will remain the same, as the standard deviation is the distance of each value from the mean. Since all the scores are subtracted by 5, the effective distance from the mean is going to be the same but the mean will be reduced by 5.</span>
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Write the direct variation function given that y varies directly with x, and y = 1.5 when x = 5.
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Answer:

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Step-by-step explanation:

Formula = K=\frac{y}{x}

y α x

y = kx

Where k is the constant of proportionality.

When y = 1.5; x = 5;

We substitute these known values in the equation,

y = kx

1.5 = k5

Dividing both sides of the equation by 5 to find the value for k, we have

1.5/5= k0.3/5

Therefore,

K = 0.3

Having found the value of k,

We substitute this value into the relationship

y = kx

Therefore we have,

y = 0.3x.

The direct variation function is therefore,

y = 0.3x.

[RevyBreeze]

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Answer:

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