Michael is taking a survey of students at his high school to find out how many hours they work per week. he surveys all of the students in his freshman english class. is this a good sampling method? a) yes, because every student is required to take english. b) no, he should have surveyed students attending the high school football game. c) no, he should have surveyed students in his pe class since all grades are represented in that class. d) no, he should have taken a random sample of all students at the school to get a good sample of the entire population of the school.

The correct answer is D because he needs to to survey the entire population. By getting a random sample he can survey a variety of students from different backgrounds and lifestyles.

Step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional