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A student measured the lead content of a paint sample 6 times. The standard deviation of the measurements was found to be 1.3% of the average. Calculate the confidence interval at the 90% confidence level. confidence interval: + Can this student be 90% confident that the true value is within 1.3% of the measured average? yes no
A student measured the lead content of a paint sample 6 times. The standard deviation of the measurements was found to be 1.3% of the average. Calculate the confidence interval at the 90% confidence level. confidence interval: + Can this student be 90% confident that the true value is within 1.3% of the measured average? yes no
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16 Jun 2022
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Choose the best answer.
Suppose you collect a sample that has a mean of 37 with a 99% confidence interval of [32,42], and you are interested in the hypothesis test below at the Ī±=0.05 level.
| H0: Ī¼=43 |
| Ha: Ī¼ā 43 |
a) You should ask for more information because the sample size and standard deviation are needed for a hypothesis test of this kind.
b) You should fail to reject the null hypothesis because the p-value is greater than 0.05.
c) You should ask for more information because the confidence interval does not match the Ī±Ī± level.
d) You should reject the null hypothesis because the p-value is less than 0.05.
Ā
