SOS #3 – Flashcards
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If a significance test gives a P-value of 0.005,
answer
We do have convincing evidence against the null hypothesis
question
A buyer for a grocery chain inspects large truckloads of apples to determine the proportion p of apples in the shipment that are rotten. She will only accept the shipment if there is clear evidence that this proportion is less than 0.06. She selects a simple random sample of 50 apples from the over 20000 apples on the truck to test the hypotheses...Which of the following conditions for inference have not been met in this situation?
answer
np>= 10 and (1-p) >= 10
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In a statistical test of hypotheses, we say the data are statistically significant at level α if ?
answer
the P-value is at most α
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To estimate the mean salary µ of full professors at American colleges and universities, you obtain the salaries of a random sample of 400 full professors. The sample mean is = $73,220 and the sample standard deviation is s = $4400. A 99% confidence interval for µ is
answer
$73,220 + or - 567
question
Use Scenario 11-6. Below is a table of individual components of chi-square test of independence for the reading and glasses data:
(TABLE)
Which of the following statements is supported by the information in this table and the original two way tables?
answer
Most of the below average readers did not wear glasses
