A drug company claims that their products’ contaminations never vary by more than 2%. Sample of 5 specimens were tested and the percentages of the purities are recorded as Observation no. 1 2 3 4 5 Percentages (%) 98.8 97.2 98.9 97.7 97.9 a. Do the sample data have enough proof to oppose the manufacturer's claim? (HINT: take the range of 2% equal 46.) b. Find a 90% confidence interval for o?.

MATLAB: An Introduction with Applications
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A drug company claims that their products’ contaminations never vary by more than
2%. Sample of 5 specimens were tested and the percentages of the purities are recorded as
Observation no.
1
2
3
4
5
Percentages (%)
98.8
97.2
98.9
97.7
97.9
a. Do the sample data have enough proof to oppose the manufacturer's claim? (HINT: take the
range of 2% equal 4o.)
b. Find a 90% confidence interval for o?.
Transcribed Image Text:A drug company claims that their products’ contaminations never vary by more than 2%. Sample of 5 specimens were tested and the percentages of the purities are recorded as Observation no. 1 2 3 4 5 Percentages (%) 98.8 97.2 98.9 97.7 97.9 a. Do the sample data have enough proof to oppose the manufacturer's claim? (HINT: take the range of 2% equal 4o.) b. Find a 90% confidence interval for o?.
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