Using Normal Approximation. In Exercises 5-8, do the following: If the requirements of np ≥ 5 and nq ≥ 5 are both satisfied, estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution; if np ≤ 5 or nq < 5, then state that the normal approximation should not be used.

Guessing on Standard Tests With n = 50 guesses and p = 0.2 for a correct answer, find P(exactly 12 correct answers).

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Using normal approximation X has normal distributio... View the full answer