Answer:
Mean = 45.178
Standard Deviation = 10.33
Step-by-step explanation:
class m frequency, f m
f f
25 - 34 29.5 22.1 651.95 19232.525
35 - 44 39.5 31.5 1244.25 49147.875
45 - 54 49.5 37.7 1866.15 92374.425
55 - 64 59.5 25.3 1505.35 89568.352
116.6 5267.7 250323.15
mean =
standard deviation = 
Answer:
3
Step-by-step explanation: make f(x)= y and plug in -x + -1 then add 2
80% = 80/100 = 0,8
0,8 x 11 = 8,8
Answer:
164857
Step-by-step explanation:
-2 4/5 or it could also be written as -14/5