Question

Johnny wants to know how many students in his school enjoy watching science programs on TV. He poses this question to all 26 students in his science class and finds that 75% of his classmates enjoy watching science programs on TV. He claims that 75% of the school's student population would be expected to enjoy watching science programs on TV. Is Johnny making a valid inference about this population?

Answer 1

ok so, what you have to do is..

Answer 2

Precents always go over 100

Answer 3

divide that, then divide it by 26

Answer 4

there your answer shall be

Answer 5

i think 75% of his classmates not equal 75% of his school's students

Answer 6

I agree with Jhonyy9.

When you're conducting a survey, you have to make sure you're asking a random group of people otherwise you would have selection bias.

An example of selection bias:
You ask 50 people at the ice cream shop whether they like ice cream or cake more. 80% of them say that they like ice cream more.

But here's the problem- you cannot generalize this data to the whole population.

Why?
Because you're asking people at the ice cream shop. They're probably at the ice cream shop because they like ice cream more. Now if you asked every 5th person entering the library whether they like ice cream more or cake more, there would be no bias in that group.

Answer 7

Now, I'm sure your question has answer choices so knowing what I just told you. What do you think the answer would be?