Given asphalt content test data: a. Calculate the overall mean and standard deviation for the entire test period. b. The contract specifications require an average asphalt content of 5.5% +/- 0.5% every Plot the daily average asphalt content. Show upper and lower control limits. c. Do all of these samples meet the contract specifications? Explain your answer. What trend do you observe based on the data? What could cause this trend? Date Sample Asphalt Numb Conte nt 06

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Given asphalt content test data:
a. Calculate the overall mean and standard deviation for the entire test period.
b. The contract specifications require an average asphalt content of 5.5% +/- 0.5% every day.
Plot the daily average asphalt content. Show upper and lower control limits.
c. Do all of these samples meet the contract specifications? Explain your answer.
What trend do you observe based on the data? What could cause this trend?
Sample
Number
Asphalt
Content %
Date
5-Мay
5-Мay
6-Мay
6-Мay
7-May
7-Мay
8-Мay
8-May
9-Мay
9-May
12-May
12-May
13-May
13-Мay
14-May
14-May
15-Мay
15-Мay
16-May
16-Мay
1
5.7
5.8
5.3
5.4
5
5.7
5.7
7
5.6
5.8
5.4
10
5.5
11
5.3
12
5.6
13
5.8
14
5.1
15
5.8
16
5.9
17
5.1
18
6.2
19
5.2
20
4.8
Transcribed Image Text:Given asphalt content test data: a. Calculate the overall mean and standard deviation for the entire test period. b. The contract specifications require an average asphalt content of 5.5% +/- 0.5% every day. Plot the daily average asphalt content. Show upper and lower control limits. c. Do all of these samples meet the contract specifications? Explain your answer. What trend do you observe based on the data? What could cause this trend? Sample Number Asphalt Content % Date 5-Мay 5-Мay 6-Мay 6-Мay 7-May 7-Мay 8-Мay 8-May 9-Мay 9-May 12-May 12-May 13-May 13-Мay 14-May 14-May 15-Мay 15-Мay 16-May 16-Мay 1 5.7 5.8 5.3 5.4 5 5.7 5.7 7 5.6 5.8 5.4 10 5.5 11 5.3 12 5.6 13 5.8 14 5.1 15 5.8 16 5.9 17 5.1 18 6.2 19 5.2 20 4.8
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