2 years ago

A college chemistry teacher wants to know whether taking a practice

Mathematics

1 answer:

Natalka [10]2 years ago

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According to cbs money watch, the average monthly household cellular phone bill is $100. suppose monthly household cell phone bi

iren2701 [21]

<span>The probability that a randomly selected monthly cell phone bill is more than $127 is given by

$P(X\ \textgreater \ 127)=1-P(X\ \textless \ 127) \\ \\ =1-P\left(z\ \textless \ \frac{127-100}{11.35} \right)=1-P(z\ \textless \ 2.38) \\ \\ =1-0.99132=0.00868$ </span>