EndiaGracee

14.04.2020 • 

Mathematics

Suppose the month in which the customer used 323 minutes was not actually that customer’s phone. That particular month the customer did not use their phone at all, so 0 minutes were used. How does changing the observation from 323 to 0 affect the standard deviation and interquartile range? What property does this illustrate? The standard deviation l and the interquartile range? What property does this illustrate?

A. decreases.
B. Dispersion increases.
C. Resistance.
D. Is not affected. Empirical Rule.
E. Weighted Mean.

Ответ:

natalie407888

04.09.2022

Mathematics

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You need to get the ^2 by itself.
4(x - 2)^2 = 25
Divide both sides by 4
(x - 2)^2 = 25/4
To clear the power of 2 take the square root of each side.
When you take the square root you get two answers, a "+" and a "-".
x - 2 = + - sqrt (25/4)
x - 2 = + - 5/2
add 2 to both sides
x = 2 + - 5/2
x = 2 + 5/2 = 4.5
x = 2 - 5/2 = -0.5

Hope this helps!

in short the answer is -0.5

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