Question

A sample of 12 random FICO scores are given as follows: { 664, 693, 698, 714, 751, 753, 779, 789, 802, 818, 834, 836}.

Required:
Store these values as a list on your TI 83/84 calculator and find your 5 Number Survey.

Answer 1

5 - number summary:

Minimum : 664

First quartile : 706

Median : 766

Upper quartile : 810

Maximum : 836

Explanation:

Given the data:

664, 693, 698, 714, 751, 753, 779, 789, 802, 818, 834, 836

Sorted data :

664, 693, 698, 714, 751, 753, 779, 789, 802, 818, 834, 836

Minimum =664

Lower quartile (Q1) = 1/4(n+1)th term

Q1 = 1/4(13) = 3.25 = (3rd + 4th) = (698 + 714) / 2 = 706

Median (Q2) = 1/2(n+1)th term

Q2 = 1/2(13) = 6.5 = (6th + 7th) = (753 + 779) / 2 = 766

Upper quartile (Q3) = 3/4(n+1)th term

Q3 = 3/4(13) = 9.75 = (9th + 10th) = (802 + 818) / 2 = 810

Maximum = 836