The following data give the total food expenditures (in dollars) for the past one month for a sample of 20 families.
|
1132
|
537
|
1245
|
576
|
421
|
866
|
1495
|
696
|
1267
|
1185
|
|
932
|
1135
|
735
|
1065
|
935
|
930
|
1045
|
1196
|
1363
|
454
|
a. Calculate the mean and median for these data.
Mean =
Median =
b. Calculate to 2 decimal places the 20% trimmed mean for these data.
20% trimmed mean =