Sum of squared deviations from mean is

A) ∑▒x
B) ∑▒〖(x-x ̅ 〗)2
C) ∑▒x2
D) (∑▒x)2
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B) ∑▒〖(x-x ̅ 〗)2

If θ ≤ 50 then hypothesis is called

A) Simple hypothesi
B) Composite hypothesis
C) Alternative hypothesis
D) None of these
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B) Composite hypothesis

1- β is called:

A) level of significance
B) level of confidence
C) Power of the test
D) Type I error
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