math 115
posted by george on .
i am trying to find this answer there are 3 questions.
1. micheal kept the following records of her phone bills for 12 months:
$47, $42, $56, $46, $63, $49, $47, $40, $58, $63, $51, $62
Find the mean and median of michael's monthly phone bills.
A) mean: $52, median: $50 C) mean: $50, median: $52
B) mean: $52, median: $48 D) mean: $48, median: $50
2.Find the fivenumber summary of the following set of numbers. the answers at the bottom a,b,c,d.
0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27
A)0.08, 0.18, 0.223, 0.27, 0.32
C)0.08, 0.18, 0.225, 0.27, 0.28
B)0.08, 0.18, 0.235, 0.27, 0.32
D)0.08, 0.16, 0.23, 0.28, 0.32
Find the first and third quartiles, Q1 and Q3, of the following set of numbers.
14, 4, 13, 18, 8, 15, 8, 3, 11, 8
A) 4; 13 B) 4; 15
C) 8; 14 D) 3; 18

1.
The mean can be found by adding up each value and dividing by the number of values. The mean is the middle value when the values are put in order.
2.
The 5 number summary is the following: the minimum value, the 1st quartile, the median, the 3rd quartile, and the maximum.
The 1st quartile is the median of all values less than the median. Similarly, the 3rd quartile is the median of all values greater than the median. 
thank you now i understand it, i didn't know what i was doing.