He data set gives the number of hours it took each of the 10 students in a cooking class to master a particular technique. {5, 3, 5, 30, 4, 5, 4, 3, 4, 5} the best measure of center for this data set is

 4.5

Step-by-step explanation:

The given data set : 5, 3, 5, 30, 4, 5, 4, 3, 4, 5

It can be seen that it contains an outlier (30), then the  best measure of center for this data set is median value. [∵ Mean gets affected by outlier extremely.]

First arrange data in an order :  3, 3 ,4 ,4 ,4 ,5 ,5 ,5 ,5 ,30

Since , the number of data values =10 (Even)

Then, Median = Mean of the middle two values

i.e. Median =

Hence, the best measure of center for this data set is 4.5 .

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.

the answer is 13 cm