Answer:
Step-by-step explanation:
Given that a statistics student would like to estimate the average age of students at her college.
Population std dev =2.5years
For 99% , Z critical = ±2.59
Margin of error = 
Simplify to get
n = 167.70
n=168
She must survey 168 people
Answer:
10
Step-by-step explanation:
To figure the mean, add up the numbers, 3+3+6+7+9+12+12+19=71 then divide it by the number of data points 71/7=10.1428571, I rounded it to 10.
Answer:
Which expression represents the area?
Which expression represents the perimeter? 2x squared plus 8x - 2
Step-by-step explanation:
A= LxW
P= L+W+L+W
