2 Five samples of cloth are cut in half and one half of each sample is treated with a 3. strengthening compound. Both the treated and untreated pieces are pulled by a testing machine till they break and the weights in kg to break them are given below in Table 1. From previous experiments, it is known that the variance of each population of possible weights is 0.5 kg. Explain your test adopted to determine whether or not the use of the strengthening compound has had any effect on the breaking strength at the 10 per cent significance level. Table 1. Breaking strength in kg weight for treated and untreated clothes Breaking strength in kg-weight Sample clothes 1 2 3 4 5 Treated pieces 20.5 21.3 19.8 18.4 20.6 Untreated pieces 20.1 20.8 19.7 18.5 20.0 84

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2 Five samples of cloth are cut in half and one half of each sample is treated with a
3.
strengthening compound. Both the treated and untreated pieces are pulled by a
testing machine till they break and the weights in kg to break them are given
below in Table 1. From previous experiments, it is known that the variance of
each population of possible weights is 0.5 kg. Explain your test adopted to
determine whether or not the use of the strengthening compound has had any
effect on the breaking strength at the 10 per cent significance level.
Table 1. Breaking strength in kg weight for treated and untreated clothes
Breaking strength in kg-weight
Sample clothes
1
2
3
4
5
Treated pieces
20.5
21.3
19.8
18.4
20.6
Untreated pieces
20.1
20.8
19.7
18.5
20.0
84
Transcribed Image Text:2 Five samples of cloth are cut in half and one half of each sample is treated with a 3. strengthening compound. Both the treated and untreated pieces are pulled by a testing machine till they break and the weights in kg to break them are given below in Table 1. From previous experiments, it is known that the variance of each population of possible weights is 0.5 kg. Explain your test adopted to determine whether or not the use of the strengthening compound has had any effect on the breaking strength at the 10 per cent significance level. Table 1. Breaking strength in kg weight for treated and untreated clothes Breaking strength in kg-weight Sample clothes 1 2 3 4 5 Treated pieces 20.5 21.3 19.8 18.4 20.6 Untreated pieces 20.1 20.8 19.7 18.5 20.0 84
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