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The Dubai traffic department believes that at least twenty-five percent of the drivers stopped on a...

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Statistics

The Dubai traffic department believes that at least twenty-fivepercent of the drivers stopped on a given day are using their cellphones. Assume that a sample of 75 drivers were stopped on Fridayand it was found that nine drivers in the sample were using theircell phones.

  1. State the null and alternative hypotheses.

  2. Test the hypotheses at the 5% significance level. What is thep-value of the test?

  3. Do you have evidence to conclude that at least twenty-fivepercent of the drivers are using their cell

    phones?

  4. Explain in words what the p-value you found in part bmeans/tells you.

  5. What type of error you can commit here? What are theimplications of this error?

Answer & Explanation Solved by verified expert
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Ho p 025Ha p 025X    See Answer
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