(08.01) carla wants to know how many students in her school enjoy watching reality tv shows. she asks all 22 students in her science class and finds that 40% of her classmates enjoy watching reality tv shows. she claims that 40% of the school's student population would be expected to enjoy watching reality tv shows. is carla making a valid inference about her population?

No, Carla is not making a valid inference.

Step-by-step explanation:

First of all, the sample population is only 22, in the whole school which might have a population of 1000 or more students. This is very small sample to derive any valid inference. Secondly, she asked the question to only her class and 40% students of her class only like reality shows. This is not necessary that each class has 40% students who like the same. It might be possible that many students don't like such shows.

So, this cannot be a valid inference.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour