The Melodic Kortholt Company will change its current health plan if at least half the employees are dissatisfied with it. A trial sample of 25 employees shows that 16 are dissatisfied. In this problem:
A)normality of the sample proportion should not be assumed.
B)normality of the sample proportion can be assumed.
C)normality of the sample proportion cannot be judged without knowing π.

Question

Quizplus · Accepted Answer

The sample size (25) is large enough to assume normality of the sample proportion (np=25*0.5=12.5 and nq=25*0.5=12.5 are both greater than 10). Therefore, we can use the normal distribution to make inferences about the population proportion.

The Melodic Kortholt Company Will Change Its Current Health Plan