pam surveyed 18 students at her school about their favorite classes. of the students surveyed, 6 said their…
pam surveyed 18 students at her school about their favorite classes. of the students surveyed, 6 said their favorite class was english. if pam surveys 12 more students, how many of them should she expect to pick english, based on past data? students
Answer
Explanation:
Step1: Calculate the proportion of students who like English
The proportion $p=\frac{6}{18}=\frac{1}{3}$.
Step2: Predict the number of students who like English among the new - surveyed students
The number of new - surveyed students is $n = 12$. Multiply the proportion by the number of new - surveyed students. So the expected number $E=p\times n=\frac{1}{3}\times12 = 4$.
Answer:
4