Grade in math is really low im stupid. question 1 (multiple choice worth 5 points)
(08.01)maggie wants to know how many students in her school enjoy watching sports on tv. she asks all 25 students in her math class and finds that 60% of her classmates enjoy watching sports on tv. she claims that 60% of the school's student population would be expected to enjoy watching sports on tv. is maggie making a valid inference about her population?
yes, it is a valid inference because she asked all 25 students in her math class
yes, it is a valid inference because her classmates make up a random sample of the students in the school
no, it is not a valid inference because her classmates do not make up a random sample of the students in the school
no, it is not a valid inference because she asked all 25 students in her math class instead of taking a sample from her geography class
question 2 (multiple choice worth 5 points)
(08.01)bart takes a random sample of 50 students in his seventh-grade class and finds that 40% of the sample prefers chocolate ice cream over vanilla ice cream. there are 200 students in the seventh grade. based on the sample proportion, about how many students in the seventh grade would be expected to prefer chocolate ice cream over vanilla ice cream?
40
80
50
200
question 3 (multiple choice worth 5 points)
(08.01)angie takes a random sample of 100 students in her school and finds that 58% of the sample prefers art over music. there are 1,200 students in the school. based on the sample proportion, how many students in the school would be expected to prefer art over music?
696
1,200
58
100
question 4 (multiple choice worth 5 points)
(08.01)angela wants to know how many families in her neighborhood plan to attend the parade. she puts all 120 of the neighborhood addresses in a hat and draws a random sample of 30 addresses. she then asks those families if they plan to attend the parade. she finds that 40% of the families plan to attend the parade. she claims that 40% of the neighborhood families would be expected to attend the parade. is this a valid inference?
yes, this is a valid inference because the 30 families speak for the whole neighborhood
yes, this is a valid inference because she took a random sample of the neighborhood
no, this is not a valid inference because she did not take a random sample of the neighborhood
no, this is not a valid inference because she asked only 30 families