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scores on a scholastic aptitude test are normally...

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scores on a scholastic aptitude test are normally distributed with standard deviation ?=100 points. A group of 25 inner city high school students takes the test; their mean scores is x-bar = 440 points. A researcher believes that the mean scores for the population of all such students is less than 500. State Ho and Ha for a test of this claim. Is the sample result statistically significant at the 1% level?

 

Paper#13156 | Written in 18-Jul-2015

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