MORE ANSWERS PLEASE Incorrect Answer Below Not coming right

MORE ANSWERS PLEASE! Incorrect Answer Below! Not coming right!

The Thomas Supply Company Inc. is a distributor of gas-powered generators. As with any business, the length of time customers take to pay their invoices is important. Listed below, arranged from smallest to largest, is the time, in days, for a sample of The Thomas Supply Company Inc. invoices.

   13

13

13

20

26

29

31

33

34

34

35

35

36

37

38

   41

41

41

45

46

47

47

50

52

54

55

56

62

67

82

Solution

a:

Determine the first and third quartiles

1st Qu: 33.25

3rd Qu.: 49.25

By using R software

> data1=c(   13,13,13,20,26,29,31,33,34,34,
+ 35,35,36,37,38,  41,41,41,45,46,47,47,
+ 50,52,54,55,56,62,67,82)
> summary(data1)
   Min. 1st Qu. Median    Mean 3rd Qu.    Max.
13.00   33.25   39.50   40.43   49.25   82.00

..................................................................................

b:

Calculation:

1st decile: 16.5
2nd decile: 30
3rd decile: 34
4th decile: 35.5
5th decile: 39.5
6th decile: 43
7th decile: 47
8th decile: 53
9th decile: 59

http://www.hackmath.net/en/calculator/decile

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C: By using R software

Determine the 67th percentile: 46.43

By using R software

> data1=c(   13,13,13,20,26,29,31,33,34,34,
+ 35,35,36,37,38, 41,41,41,45,46,47,47,
+ 50,52,54,55,56,62,67,82)

> quantile(data1, 0.67)
67%
46.43