You want to determine if the average gas price in your city has exceeded $1.30 per litre for regular unleaded gasoline.You take a random sample of prices from 8 gas stations ,recording the following prices: $1.33,$1.30,$1.05,$1.29,$1.37,$1.32,$1.30,$1.31.Have the conditions and assumptions for inference been met?
A) No,the nearly normal condition is not met.
B) No,the sample is not random.
C) No,the sample is not representative.
D) Yes,all conditions and assumptions have been met.
E) No,the sample is more than 10% of the population.
Correct Answer:
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Q2: P-value for |t| > 1.44 with 45
Q2: 80% confidence interval with df = 11
A)1.280
B)1.372
C)2.718
D)1.356
E)1.363
Q8: A 99% confidence interval from a sample
Q10: 95% confidence interval with df = 15
A)2.131
B)2.120
C)2.145
D)1.753
E)1.960
Q10: P-value for |t| ≥ 2.13 for a
Q11: P-value for |t| > 1.76 with 24
Q19: A 95% confidence interval with df =
Q82: P-value for t ≤ 1.44 with 45
Q86: P-value for t ≥ 2.13 for a
Q90: P-value for t ≤ 2.13 for a
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