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  • From Mathematics: Statistics
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  • Due on Aug. 05, 2009
  • Asked on Aug. 02, 2009 at 08:04:12AM
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A researcher asks whether attending a private high school leads to higher or lower performance on a test of social skills when compared to students attending public schools. A sample of 100 students from a private school produces a mean score of 71.30. The population mean (m) for students from public high schools is 75.62. The population standard deviation is 28. Zobt is –1.54. Zcrit is ± 1.96.
• Should the researcher use a one-tailed or a two-tailed test? Why?
 

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Should the researcher use a one-tailed or a two-tailed test - Complete solution with explanation
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  • Posted on Aug. 02, 2009 at 08:48:55AM
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ksugan
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Preview: ... x-bar = 71.30, mu = 75.62, sigma = 28, z = -1.54, Criti ...
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