91Ó°ÊÓ

Number of passengers in flight$=76$

First-class passengers $=12$in first class

Coach class passengers $=64$

Passengers for SRS screening$=10$

Based on the 76-person population, here the sample size of 10 is greater than $10\%$of the 76 -person population so the$10\%$condition is not met.

Number of passengers in flight$=76$

First-class passengers $=12$in first class

Coach class passengers$=64$

Passengers for SRS screening $=10$

Given for the population:

$x=12$

$n=76$

Based on the sample size divided by the number of successes, the population proportion is:

localid="1650014761501" $$\begin{gathered} p=\frac{x}{n} \\ =\frac{12}{76} \end{gathered}$$

Sample given:

$n=10$

As long as $np$and $n(1-p)$are both at least $10$, the condition is met.

localid="1650014767325" $$\begin{gathered} np=10×\frac{12}{76} \\ ≈1.58 \end{gathered}$$

localid="1650014773670" $$\begin{gathered} n(1−p)=10×\left(1−\frac{12}{76}\right) \\ ≈8.42 \end{gathered}$$

Neither of them exceeds $10$, so the Normal condition has not been met.