<span>Elijah's prediction is high because 180 * (1/4) = 45</span>
Answer:
(A) Mean = 84
(B) Variance = 118.714
(C) Standard deviation = 10.89
Step-by-step explanation:
Data provided:
number of observations, n = 15
sample of 15 costco customer satisfaction scores follow
X
95 11 121
90 6 36
83 -1 1
64 -20 400
95 11 121
98 14 196
80 -4 16
83 -1 1
82 -2 4
93 9 81
86 2 4
80 -4 16
94 10 100
75 -9 81
62 -22 484
================================================
∑X = 1260 ∑= 1662
Now,
(A) Mean =
or
Mean = = 84
(B) Variance =
or
Variance =
or
Variance = 118.714
(C) Standard deviation = √Variance = √118.714 = 10.89
Step-by-step explanation:
y=mx +b
b= 5
12.5= 10m+5
10m = 7.5
m= 0.75
y=0.75x +5
..........
at x= 20 , y= 20
at y= 27.5 , x= 30
at x= 40 , y= 35
Answer:
Step-by-step explanation:
as the temp t increases the number of cricket chirps also increases.
Answer:
x=9
Step-by-step explanation:
2x+3(6)=36
2x+18=36
2x=18
x=9