Question

daily cell phone minutes used

mon	tues	wed	thurs	fri	sat	sun
38	62	40	10	30	55	65

1. round the following value $\frac{1}{7}sum_{i = 1}^{7}x_{i}$ to the nearest minute.
2. round the following value $\frac{1}{4}sum_{i = 2}^{5}x_{i}$ to the nearest minute.

Explanation:

Step1: Calculate sum for question 10

$x_1 + x_2+x_3+x_4+x_5+x_6+x_7=38 + 62+40+10+30+55+65 = 300$

Step2: Calculate average for question 10

$\frac{1}{7}\sum_{i = 1}^{7}x_i=\frac{300}{7}\approx43$

Step3: Calculate sum for question 11

$x_2 + x_3+x_4+x_5=62 + 40+10+30 = 142$

Step4: Calculate average for question 11

$\frac{1}{4}\sum_{i = 2}^{5}x_i=\frac{142}{4}=35.5\approx36$

Answer:

1. 43
2. 36