Question

NEED HELP WILL FAN AND MEDAL




For a sample of 100 students, the median number of text messages sent per day is 90, the first quartile is 78, and the third quartile is 102. Select all of the answers that create a true statement.

Approximately 25 students in the sample send

a)more than 90 text messages.
b)less than 90 text messages.
c)more than 78 text messages.
d)more than 102 text messages.
e)between 90 and 102 text messages.
f)less than 78 text messages.
g)between 78 and 102 text messages.

Answer 1

Well the first quartile is the lower end of the spectrum, the last quartile is the higher end. From the information in the text, what answers can you choose already?

Answer 2

a e and f

Answer 3

wait no

Answer 4

c and g

Answer 5

since there are 100 students in this study, 25 students represents 25/100, or 25%, or 1/4. Think of this as part of the area under a standard normal curve.

Might be a good idea to review "quartile." The lower end of the spectrum is actually 0, whereas the upper end is 100%.

How do these facts relate to "quartile?"
Hint: If you draw a standard normal curve and then mark the four quartiles, what would be the area of each quartile?

Answer 6

hm

Answer 7

I think we should agree on the meaning of "quartile" before tossing out possible answer choices.

Answer 8

so a quartile is 25% of the data

Answer 9

A box and whisker plot may help