Question

Write the sigma notation mean formula for the 3 consecutive month period that would have the highest mean of the year.

Answer 1

Answer:

Mean = 90.67

Step-by-step explanation:

The three consecutive month periods with the highest monthly cell phone bills are:

May, June, July

May, x₅ = $95

June, x₆ = $87

July, x₇ = $90

The mean of the three consecutive month periods with the highest mean of the year is calculated below

`\begin{gathered} Mean=(\sum x_(567))/(3) \\ \\ Mean=(x_5+x_6+x_7)/(3) \\ \\ Mean=(95+87+90)/(3) \\ \\ Mean=(272)/(3) \\ \\ Mean=90.67 \end{gathered}`