Q2 Palm oil fuel ash (POFA) is a pozzolanic material that can be used as cement replacement in concrete mix. When used as 5% replacement of cement, POFA is said to have the ability to increase the compressive strength of concrete. A researcher conducted a study to prove this claim. The results can be found in Table Q2. Assuming that the data is normally distributed, can it be concluded that 5% POFA significantly increases compressive strength at the 0.05 significance level?
Q2 Palm oil fuel ash (POFA) is a pozzolanic material that can be used as cement replacement in concrete mix. When used as 5% replacement of cement, POFA is said to have the ability to increase the compressive strength of concrete. A researcher conducted a study to prove this claim. The results can be found in Table Q2. Assuming that the data is normally distributed, can it be concluded that 5% POFA significantly increases compressive strength at the 0.05 significance level?
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
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Transcribed Image Text:Table Q2: Compressive strength tests conducted on concrete with and without palm oil fuel ash (POFA)
as cement replacement
Compressive Strength of Concrete (N/mm²)
Test
Without POFA
With 5% POFA
1
32.5
30.9
2
42.7
42.3
3
44.0
48.5
4
28.5
38.7
5
30.8
42.6
39.6
37.0
7
41.8
47.6
8.
40.2
43.6
9.
35.4
48.9
10
32.1
52.3
11
33.0
34.2
12
39.6
33.9
13
46.2
48.0
14
41.7
35.9
15
36.6
40.4
Note: The results shown are for concrete cubes cured for 28 days
Transcribed Image Text:Q2 Palm oil fuel ash (POFA) is a pozzolanic material that can be used as cement
replacement in concrete mix. When used as 5% replacement of cement, POFA is said
to have the ability to increase the compressive strength of concrete. A researcher
conducted a study to prove this claim. The results can be found in Table Q2. Assuming
that the data is normally distributed, can it be concluded that 5% POFA significantly
increases compressive strength at the 0.05 significance level?
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