Practice Exercise
a.
Find the range and mean of the following.
75, 52, 41, 68, 67, 33
b. 92, 94, 97, 98, 99, 91, 95
c. 300, 350, 325, 225, 250, 300, 375, 350
d. 37, 35, 38, 34, 39, 36, 33, 34, 36
e. 9, 28, 42, 76, 34, 59, 68, 12, 85, 99
Answers
Range means The difference of Smallest number by highest number.
Mean means The Average of all numbers.
★Formulae of Range = Highest Number - Smallest Number.★
★Formulae of Mean = Sum of Observation/ Number of Observation.★
a. 75, 52, 41, 68, 67, 33
Sol'n. In Ascending Order —
75> 68>67>52>41>33
Range = ( Applying Formulae.)
= 75 - 33
= 42.
Mean = (Applying Formulae.)
75 + 68 + 67 + 52 + 41 + 33/6
= 336.
b. 92, 94, 97, 98, 99, 91, 95
Sol'n. In Ascending Order —
99>98>97>95>94>92>91
Range = 99 - 91
= 8.
Mean = 99 + 98 + 97 + 95 + 94 + 92 + 91/7
= 588.
c. 300, 350, 325, 225, 250, 300, 375, 350
Sol'n. In Ascending Order —
375 > 350 > 350 >325> 300 >300 >250>225
Range = 375 - 225
= 150.
Mean = 300+ 350+ 325+ 225+ 250+ 300+ 375+ 350/8
= 2168.75
d. 37, 35, 38, 34, 39, 36, 33, 34, 36
Sol'n. In Ascending Order—
39 , 38, 37, 36, 36,35 ,34 ,34,33,
Range = 39 - 33
6.
Mean = 39 + 38+ 37+ 36+ 36+35 +34+ 34+33/9
= 292.666667.
Answer:
42and56
Step-by-step explanation:
it's a correct answer