The table below shows data from a survey about the amount of time students spend doing homework each week. the students were either in college or in high school:

high low q1 q3 iqr median mean σ
college stu 50 6 8.5 17 8.5 12 15.4 11.7
high school 28 3 4.5 15 10.5 11 10.5 5.8

which of the choices below best describes how to measure the spread of this data?

a. both spreads are best described with the iqr.
b. both spreads are best described with the standard deviation.
c. the college spread is best described by the iqr. the high school spread is best described by the standard deviation.
d. the college spread is best described by the standard deviation. the high school spread is best described by the iqr.

C.

Step-by-step explanation:

C is the correct answer...think it thru, its the only one that makes any sense.

C. The college spread is best described by the IQR. The high school spread is best described by the standard deviation.

Step-by-step explanation:

When talking about the spread of the data we mean the measure of how far the numbers are apart from the center (mean, median) in a set. This can help determine how much variation is in the values.

table 1

step-by-step explanation:

1-16

2-32

4-64

8-128

all multiples of 16

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".