8.01)ben takes a random sample of 25 students in his seventh-grade class and finds that 85% of the sample prefers math over science. there are 150 students in the seventh grade. based on the sample proportion, about how many students in the seventh grade would be expected to prefer math over science?
25
85
150
128
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, it is not a valid inference because she asked all 22 students in her science class instead of taking a sample from her music class
no, it is not a valid inference because she asked all 22 students in her science class instead of taking a sample of the students in her school
yes, it is a valid inference because she asked all 22 students in her science class
yes, it is a valid inference because her classmates make up a random sample of the students in the school