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A researcher hypothesizes college students will be more extroverted than the population mean for extroversion and...

A researcher hypothesizes college students will be more extroverted than the population mean for extroversion and collects n = 177 students. The researcher performs a one-tail z test with alpha set to 0.05 and finds a sample z score is 2.44, showing evidence for the researcher's predictions. What is the probability (as % or proportion) the researcher made a type 1 error?

b. A researcher hypothesizes that coffee drinkers and non coffee drinkers will have different incidences of clinical anxiety. The researcher finds that those who drink more coffee are more likely to be anxious. Is this research a one tail or two tail test?

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orchestra answered 1 year ago
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