Answer:
10
Step-by-step explanation:
The predicted value of hardness at 37 hours is 243.87 and an 85% confidence interval for the mean hardness is (242.12, 245.61). At 41 hours, the predicted hardness is 252 and an 85% confidence interval for mean hardness is (249.83, 254.18). The confidence interval for X is equals to 41 which is wider because the value 41 is farther away from the sample mean X than is 37. As an outcome, the standard error for the prediction is larger.
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Answer: 4 1/2
Step-by-step explanation:
Answer:
23.5
Step-by-step explanation:
Beacuse 235.55 and 10% equals 23.5