Mathematics, 10.11.2020 19:40, mooreadrian412

The cafeteria manager at a local middle school would like to survey students to get their opinion on the new lunch menu. Which of the following sampling methods would be most effficient in reducing bias? A. Select one class at random, then survey each student in that class.
B. Obtain an alphabetical list of all students that attend the school, then survey every 10th student.
C. Have each eighth grader complete a survey during homeroom.
D. Randomly survey 10 students in the cafeteria.

Answers: 1

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answered: Guest

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

$4/2 = 2\\7/3.5=2\\8/4=2\\10/5=2$

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

$y=\frac{x}{2}$

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.

answered: Guest

the answer is 489

step-by-step explanation:

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The cafeteria manager at a local middle school would like to survey students to get their opinion on...