Answer:
10-12:
class mark: 11
(x-mean)² = 34.81
13-15:
f(x) = 126
(x-mean)² = 8.41
f(x-mean)² = 75.69
16-18:
class mark: 17
(x-mean) = 0.1
19-21:
f(x) = 160
(x-mean) = 3.1
f(x-mean)² = 76.88
22-24:
class mark: 23
(x-mean) = 6.1
summation of f(x-mean)² = 440.7
hope this helps
CLASS MARK X:
11
17
23
F(X):
126
160
(x-x):
0.1
3.1
6.1
(x-x)²:
34.81
8.41
f(x-x)²:
75.69
76.88
Ef(x-x)²=440.7
hope it helps good luck
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Answers & Comments
Answer:
10-12:
class mark: 11
(x-mean)² = 34.81
13-15:
f(x) = 126
(x-mean)² = 8.41
f(x-mean)² = 75.69
16-18:
class mark: 17
(x-mean) = 0.1
19-21:
f(x) = 160
(x-mean) = 3.1
f(x-mean)² = 76.88
22-24:
class mark: 23
(x-mean) = 6.1
summation of f(x-mean)² = 440.7
hope this helps
Answer:
CLASS MARK X:
11
17
23
F(X):
126
160
(x-x):
0.1
3.1
6.1
(x-x)²:
34.81
8.41
f(x-x)²:
75.69
76.88
Ef(x-x)²=440.7
hope it helps good luck