The probability of obtaining exactly 20 successes in 50 trials
A) is equal to 0 .
B) can be approximated by using the normal table with $x$ between 19.5 and 20.5.
C) can only be approximated by the binomial formula.
D) cannot be found using the normal table.

Question

Quizplus · Accepted Answer

The probability of obtaining exactly 20 successes in 50 trials can be approximated using the normal distribution as a continuous approximation to the binomial distribution, especially when the number of trials is large. By considering the continuity correction, we look at the probability of $x$ being between 19.5 and 20.5 to approximate the probability of exactly 20 successes.

The Probability of Obtaining Exactly 20 Successes in 50 Trials xxx

The Probability of Obtaining Exactly 20 Successes in 50 Trials $x$