Sheet # 91 Critical Thinking
Name: _____________________ Date_____________
Use drawings, words, or numbers to explain how you got your answer.
Two brands of lights bulbs were tested. The lives, in hours, of 8 bulbs of each brand are listed below. On the basis of these tests, which bulb is better?
Brand A: 950, 967, 835, 1214, 1130, 891, 1070, 998
Brand B: 1015, 898, 1147, 935, 946, 893, 1235, 842
Answers for sheet # 91
Calculate the average for each brand bulb.
Average of Brand A: (950 + 967 + 835 +1214 + 1130 + 891 +1070 + 998)/8
1006 hours
Average of Brand B: 988 hours
Brand A is superior to Brand B
Answer for sheet # 90
Let C is the capacity of the tank.
Half full means = C/2
(C/2) + 9 = (7/8) x C
4C + 72 = 7C
3C = 72
C = 24 gallons