6,7,8,9, 11, 13, 14, 14, 18
Q1: ?Q3:?

= 7.5

= 14

Step-by-step explanation:

We are given the following data;

  6, 7, 8, 9, 11, 13, 14, 14, 18

Now, is called the first Quartile of the data which represents the 25% of the data values.

is called the third Quartile of the data which represents the 75% of the data values.

Now, calculation of quartiles;

                                = obs

                                = obs = obs

So, = obs + 0.5( - )

          = 7 + 0.5(8-7) = 7 + 0.5 = 7.5

                                = obs

                                = obs = obs = obs.

So, = obs + 0.5( - )

          = 14 + 0.5(14 - 14) = 14 + 0 = 14

Therefore, = 7.5 and = 14.

well what did you do it matters what you did : )

step-by-step explanation:

1.30

step-by-step explanation: