Reference no: EM131008556
1. Suppose that you are testing the hypotheses H0: p = 0.20 vs. HA: p Z 0.20. A sample of size 250 results in a sample proportion of 0.25.
a) Construct a 95% confidence interval for p.
b) Based on the confidence interval, at a = .05 can you reject H0? Explain.
c) What is the difference between the standard error and standard deviation of the sample proportion?
d) Which is used in computing the confidence interval?
2. Suppose that you are testing the hypotheses H0: p = 0.40 vs. HA: p 7 0.40. A sample of size 200 results in a sample proportion of 0.55.
a) Construct a 90% confidence interval for p.
b) Based on the confidence interval, at a = .05 can you reject H0? Explain.
c) What is the difference between the standard error and standard deviation of the sample proportion?
d) Which is used in computing the confidence interval?
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What is the standard error of the mean
: 1. Suppose that you are testing the hypotheses H0: m = 16 vs. HA: m 6 16. A sample of size 25 results in a sample mean of 16.5 and a standard deviation of 2.0. a) What is the standard error of the mean?
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What is the sample and what is the population
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Is the slope of the least-squares line positive or negative
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The rockwell corporation uses a periodic inventory system
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Standard error and standard deviation of sample proportion
: a) Construct a 90% confidence interval for p. b) Based on the confidence interval, at a = .05 can you reject H0? Explain. c) What is the difference between the standard error and standard deviation of the sample proportion? d) Which is used in comput..
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Construct a p chart of the percentage of late flights
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Alpha level depends on the sample size
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