Elementary Statistics Chapter 10

Feb 3rd, 2012
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Solutions for chapter 10 in elementary statistics. Answered below a) What is the null hypothesis? b) What is the alternative hypothesis? c) How may degrees of freedom are there? d) What is the sample standard deviation of the difference in the test scores? e) What is the value of the test statistic? f) What is the p-value? g) How to find a C.I

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Q1A negative relationship between two variables means that for the most part, as the x variable increases, the y variable increasesA. False, As the reason Negative explains the possible maximum distance between both X and Y. i.e If value X increases Y decrease ( Distance be more ) OR if value x decrease, Y Increases ( Distance be more )Q5It is not possible to have a significant correlation by chance alone A. False, Correlation does not imply causation. There's a lot more rape when people purchase more ice cream. But people don't rape more because of the ice cream. It's due to the warm weather.If things are correlated, it's not by chance. However, this doesn't mean one thing causes the other. They could be related to a third quantity that causes them both.Source : http://qareply.com/it-is-not-possible-to-have-a-significant-correlation-by-chance-alone-400025.htmlQ19Age and Dri

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