The probability of concluding that assignable variation exists when only random variation is present is
(I)the probability of a Type I error.(II)known as the alpha risk.(III)highly unlikely.(IV)the sum of probabilities in the two tails of the normal distribution.
A)I and II
B)I and IV
C)II and III
D)I, II, and IV
E)I, III, and IV

Question

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The probability of concluding that assignable variation exists when only random variation is present is
(I) the probability of a Type I error.(II) known as the alpha risk.(III) highly unlikely.(IV) the sum of probabilities in the two tails of the normal distribution.

The Probability of Concluding That Assignable Variation Exists When Only