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  • 4 years ago

Help Please. 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. Question: •Should the researcher use a one-tailed or a two-tailed test? Why?

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  1. anonymous
    • 4 years ago
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    one-tailed test, you want to know if private school scores are significantly lower than public school scores Null Hypothesis: X = 75.62 Alternative Hypothesis: X < 75.62

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