Reference no: EM131008574
1. P-value. Have harsher penalties and ad campaigns increased seat-belt use among drivers and passengers? Observations of commuter traffic have failed to find evidence of a significant change compared with three years ago. Explain what the study's P-value of 0.17 means in this context.
2. Another P-value. A company developing scanners to search for hidden weapons at airports has concluded that a new device is significantly better than the current scanner. The company made this decision based on a P-value of 0.03. Explain the meaning of the P-value in this context.
3. Ad campaign. An information technology analyst believes that they are losing customers on their website who find the checkout and purchase system too compli- cated. She adds a one-click feature to the website, to make it easier but finds that only about 10% of the customers are using it. She decides to launch an ad awareness campaign to tell customers about the new feature in the hope of increasing the percentage. She doesn't see much of a differ- ence, so she hires a consultant to help her. The consultant selects a random sample of recent purchases, tests the hypothesis that the ads produced no change against the alternative that the percent who use the one-click feature is now greater than 10%, and finds a P-value of 0.22. Which conclusion is appropriate? Explain.
a) There's a 22% chance that the ads worked.
b) There's a 78% chance that the ads worked.
c) There's a 22% chance that the null hypothesis is true.
d) There's a 22% chance that natural sampling variation could produce poll results like these if the use of the oneclick feature has increased.
e) There's a 22% chance that natural sampling variation could produce poll results like these if there's really no change in website use.
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How many bits are required in the instruction format
: The instruction set architecture for a simple computer must support access to 64 KB of byte-addressable memory space and eight 16-bit general-purpose CPU registers.
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Independent or paired samples
: For each of the following scenarios, say whether the data should be treated as independent or paired samples. Explain briefly. If paired, explain what the pairing involves.
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Independent or paired samples
: For each of the following scenarios, say whether the data should be treated as independent or paired samples. Explain briefly. If paired, explain what the pairing involves.
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What is the amplitude of the given function
: What is the amplitude of the function? What is the period of this function? If this graph represents a cosine function, then write an equation for the function.
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Observations of commuter traffic
: P-value. Have harsher penalties and ad campaigns increased seat-belt use among drivers and passengers? Observations of commuter traffic have failed to find evidence of a significant change compared with three years ago. Explain what the study's P-..
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The following questions dealing with accounting
: An example of an item that should be reported as a prior-period adjustment in a company's annual financial statements is : a. a settlement resulting from litigation. b. an adjustment of income taxes. c. a correction of an error that occurred in a pri..
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How much did each dog weigh
: At the pet fair, darlene's dog weighed 5 times as much as leah's doog. Together, the dogs weigh 84 pounds. How much did each dog weigh
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The cecil booker vending company changed its metho
: Prepare the 2011-2010 comparative income statements beginning with income from continuing operations. Include per share amounts.
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Problem regarding the house sales
: The realty company in Exercise 21b looks at a recent sample of houses that have sold. On testing the null hypothesis that 50% of the houses take more than three months to sell against the hypothesis that more than 50% of the houses take more than ..
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