1. In order to evaluate a spectrophotometric method for the determination of titanium, the method was...

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1. In order to evaluate a spectrophotometric method for thedetermination of titanium, the method was applied to alloy samplescontaining difference certified amounts of titanium. The results(%Ti) are shown below.
Sample                       CertifiedValue          Mean              Standard Deviation
1                     0.496                          0.482              0.0257
2                     0.995                          1.009              0.0248
3                     1.493                          1.505              0.0287
4                     1.990                          2.002              0.0212
For each alloy, eight replicate determinations were made. Foreach alloy, test whether the mean value differs significantly fromthe certified value.

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3.7 Ratings (301 Votes)

Sample 1 Data n 8 0496 s 00257 xbar 0482 Hypotheses Ho 0496 Ha 0496 Decision Rule 005 Degrees of freedom 8 1 7 Lower Critical t score 2364624251 Upper Critical t score 2364624251 Reject Ho if t 2364624251 Test Statistic SE sn 002578 0009086322 t xbar SE 0482 0496000908632213824714 154078 p value 0167269951 Decision in terms of the hypotheses Since 1540777422 2364624 See Answer

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