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In-Class Worksheet
Lecture 2 Statistics
ENGR 1406
Name:________Alexandre_______________
______
1. Manually (below with pen or pencil) order these numbers in ascending order (from
smallest to largest). If a number is repeated, list both in your list.
Sample 1
2.15
2.01
Sample 2
2.70
2.15
Sample 3
1.97
2.03
Sample 4
2.15
2.70
Sample 5
2.03
1.75
1.75,1.97,2.01,2.03,2.03,
2.15,2.15,2.70,2.70
What MATLAB function can order a list of numbers in ascending order?
Sort
2. For the above numbers, what is the
a. mode _____2.03,2.60,2.15___
b. frequency of that mode __2______
3. For the below examples, fill in the mode. Examples include 1) mode is 25, 2) no mode
exists, 3) multiple mode of 25
Mode
Number List
none
4, 13, 14, 17, 31, 33
13,17
4, 13, 13, 13, 14, 17, 17, 17, 20, 29, 31, 33
17
4, 4, 13, 14, 14, 17, 17, 17, 17, 25, 31, 33
4. Match the equation to the parameter for histograms
___c_ range
A) √𝑑𝑎𝑡𝑎 𝑝𝑜𝑖𝑛𝑡𝑠
____a # of Bins
B) # 𝑜𝑓 𝑏𝑖𝑛𝑠
__b__ bin size
C) Xmax - Xmin
𝑟𝑎𝑛𝑔𝑒
5. Consider the summary values in the table
Range =
15
# of Bins =
5
Bin Size = 3