Question

2. Harry collects data from a random

sample of seventh-graders. Out of

25 respondents, 10 ride the bus to

school. Of the 150 seventh-graders

who attend Harry's school, how many

would be expected to ride the bus

to school?

A 40 seventh-aradore

Answer 1

Answer:

60 seventh graders.

Step-by-step explanation:

Harry collects data from a random sample of seventh-graders.

It is given that out of 25 respondents, 10 ride the bus to school.

Probability that the student ride the bus to school is

$\text{Probability}=\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}$

$\text{Probability}=\dfrac{10}{25}=0.4$

We need to find the expected number of students out of 150 who ride the bus  o school.

$\text{Expected number}=150\times \text{Probability}$

$\text{Expected number}=150\times 0.4$

$\text{Expected number}=60$

Hence, 60 seventh graders ride the bus to school.