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Question
NARRBEGIN: SA_113_114An automobile manufacturer needs to buy aluminum sheets with an average thickness of 0.05 inch. The manufacturer collects a random sample of 40 sheets from a potential supplier. The thickness of each sheet in this sample is measured (in inches) and recorded. The information below are pertaining to the Chi-square goodness-of-fit test.
| Upper limit | Category | Frequency | Normal | Distance measure | |
| 0.03 |  0.03 | 1 | 1.920 | 0.441 | |
| 0.04 | 0.03 but 0.04 | 10 | 8.074 | 0.459 | |
| 0.05 | 0.04 but 0.05 | 13 | 14.947 | 0.254 | |
| 0.06 | 0.05 but 0.06 | 12 | 11.218 | 0.055 | |
| >0.06 | 4 | 3.842 | 0.007 | ||
| Chi-square statistic | 1.214 |
| p-value | 0.545 |
(A) Are these measurements normally distributed? Summarize your results.
(B) Are there any weaknesses or concerns about your conclusions in (A)? Explain
Answer
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