The mean of the data set is, and the sample proportion of numbers less than the mean is. Write your answers as decimal numbers rounded off to the nearest hundredth

I have notice that it doesn't give the data set but somehow I found the same problem and got the data set. 25.5 26 18.2 15.3 28.5 27 20.7 20.2 26.1 18.2 21.4 17.9 24.3 22.6 19.6

To get the mean you just add the data and divide it with the total numbers in the data set

Solution

Mean = 25.5 + 26 + 18.2 + 15.3 + 28.5 + 27 + 20.7 + 20.2 + 26.1 + 18.2 + 21.4 + 17.9 + 24.3 + 22.6 + 19.6 / 15

= 331.5 / 15

= 22.1

The mean is 22.1