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3 years ago

* PLEASE HELP CAN'T SOLVE *

Mathematics

1 answer:

emmainna [20.7K]3 years ago

4 0

Answer:

Y=(4x)^3

Y=64x^3

Step-by-step explanation:

Y=(3√x)÷4

Making X subject of formula

4y= (3√x)

(4y)^3= (3√x)^3

(4y)^3 = X,

Replacing Y with X

Y=(4x)^3

Y=64X^3

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The standard deviation of the frequency distribution is 5.54

<h3>How to determine standard deviation?</h3>

The table of values is given as:

x f(x)

0-3 13

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8-11 10

12-15 11

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Rewrite the table by calculating the class midpoints:

x f(x)

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Start by calculating the mean using:

$\bar x = \frac{\sum fx}{\sum f}$

This gives

$\bar x = \frac{1.5 * 13 + 5.5 * 13 + 9.5 * 10 + 13.5 * 11 + 17.5 * 0 + 21.5 * 3}{13 + 13 + 10 + 11 + 0 +3}$

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$\bar x = 7.98$

The standard deviation is then calculated as:

$\sigma = \sqrt{\frac{\sum f(x - \bar x)^2}{\sum f }}$

So, we have:

$\sigma= \sqrt{\frac{13 * (1.5 - 7.98)^2 + 13 * (5.5 - 7.98)^2 + (9.5 - 7.98)^2 * 10 + (13.5 - 7.98)^2 * 11 + (17.5 - 7.98)^2 * 0 + (21.5 - 7.98)^2 * 3}{13 + 13 + 10 + 11 + 0 +3}}$

Evaluate

$\sigma= \sqrt{30.6496}$

Solve

$\sigma= 5.54$

Hence, the standard deviation is 5.54

Read more about standard deviation at:

brainly.com/question/15858152

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