QUESTION 8 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.

I, II, and IV

Step-by-step explanation:

(I) the probability of a Type I error.

(II) known as the alpha risk.

(IV) the sum of probabilities in the two tails of the normal distribution.

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation: