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 50 5 7.5 15 7.5 11 13.8 6.4
high school 16 0 9.5 14.5 5 13 10.7 5.3

which of the choices below best describes how to measure the spread of this data?
(hint: use the minimum and maximum values to check for outliers.) (2 points)

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

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

d

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!

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:

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.