Question: Describing Data: Measures of Central Tendency

         Number of Days from order date to arrival in El Paso.

   5          10        12        15        20        3          4          5          1           12

   9          19        20        24        16        21        20        15        13         9         

   5          1          2          3          17        21        14        8          6           21       

   3          6          7          15        19        5          7          9          22         23

   12        11        10        14        16        13        14        10        7           4

Using the above data, calculate the following statistics using the frequency distribution table, not the raw data:

a. The midpoint for each class (enter in table above):

b. Calculate the estimated arithmetic mean of the sample  

c. Calculate the estimated arithmetic median of the sample  

d. The estimated mode of the sample