14. Suppose a candidate running for sheriff claims that she...

Question by tracy
Submitted on 7/9/2003
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14. Suppose a candidate running for sheriff claims that she will reduce the average speed of emergency response to less than 30 minutes. (30 minutes is thought to be the average response time with the current sheriff.) There are no past records, so the actual standard deviation of such response times cannot be determined. Thanks to this campaign, she is elected sheriff, and careful records are now kept. The response times for the first month are 26, 30, 28, 29, 25, 28, 32, 35, 24, and 23 min. Using the .05 significance level, did she keep her promise? (a) Go through the five steps of hypothesis testing. (b) Illustrate your answer with a histogram of the sample’s scores and sketches of the population distribution and the distribution of means, showing the t score and cutoff points for significance. (c) Explain your answer to someone who has never taken a course in statistics.

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Answer by mr. same
Submitted on 3/25/2004
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what's the answer to this question?

Answer by CATCHUP
Submitted on 3/29/2004
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I WOULD LIKE FOR ANYONE THAT KNOWS THIS ANSWER TO EMAIL ME AT CAMIBEA@BELLSOUTH.NET

Answer by val
Submitted on 4/26/2004
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Yes, she kept her promise with an average of 28 minutes, falling within a .05 sig level.(If that is a tolerance) Sorry, no a., b., or c just a passerby online

Answer by ellen
Submitted on 4/8/2005
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I can say with 95% confidence that she kept her promise. I know this to be true, because the mean of this sample is 28, which does fall below thirty. I followed the five steps for testing a hypothesis, determined the characteristics, determined the sample cutoff score, then determined where my cutoff score was in relation to the t score chart, and concluded from this that my score did exceed the t score cutoff limits from the chart. Therefore, I had to reject the null hypothesis which stated that she had the same response time as did the previous sheriff. Hope that helps!

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