The table shows summary statistics for the lengths of time students in two different classes took to complete a test.
class 1 median time: 37 min range: 8 min
class 2 median time: 45 min range: 4 min
which conclusion is true?
students in class 1 took more time to complete the test than students in class 2, and their times were less variable.
students in class 1 took more time to complete the test than students in class 2, and their times were more variable.
students in class 1 took less time to complete the test than students in class 2, and their times were more variable.
students in class 1 took less time to complete the test than students in class 2, and their times were less variable.

Option C) Students in Class 1 took less time to complete the test than students in Class 2, and their times were more variable

Step-by-step explanation:

Given that median time of class 1 is 37 and range is 8 minutes

This implies the time has minimum as 33 and maximum as 41.

Median time for class 2 is 45 with range 4 minutes

This implies minimum time for class 2 is 43 and maximum time is 47.

On comparing we find that class 1 took less time to complete the test than students in class 1

But since there is more difference i.e. range is double for class I as that of class II there is more variability in class I than II.

Hence answer is

C Students in Class 1 took less time to complete the test than students in Class 2, and their times were more variable

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b