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

d. I, II, and IV

Step-by-step explanation:

The probability of a type I error: A type I error comes to play when one turns down the null hypothesis when it is true.

known as the alpha risk: this is also referred to as type I error, it is the risk in a statistical test which shows that a null hypothesis will be rejected even though it is actually true.

The sum of probabilities in the two tails of the normal distribution.

Hence, I, II, and IV are the options

the distance from any point on the parabola to the focus is the exact same as the distance from that point to the directrix.

if you could provide answer choices that might allow me to answer the question easier if my above answer isn't an option! (:

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!