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researcher wants to know if a treatment significantly changes the wellbeing of someone with depression. The average person with depression scores a 7.2 on a wellbeing scale with a SD of 1.4 points. The researcher administers the treatment to 25 clients for a month and finds their wellbeing at the end to be 7.7. Assume an alpha level of .05.  Imagine we know that a treatment actually does have an effect but the researcher concludes there is no effect. 1a. How could we decrease this probability? Imagine we know that a treatment does not actually have an effect but the researcher concludes there is an effect. 2a. What error has the researcher made?

researcher wants to know if a treatment significantly changes the wellbeing of someone with depression. The average person with depression scores a 7.2 on a wellbeing scale with a SD of 1.4 points. The researcher administers the treatment to 25 clients for a month and finds their wellbeing at the end to be 7.7. Assume an alpha level of .05.  Imagine we know that a treatment actually does have an effect but the researcher concludes there is no effect. 1a. How could we decrease this probability? Imagine we know that a treatment does not actually have an effect but the researcher concludes there is an effect. 2a. What error has the researcher made?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 15PPS
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A researcher wants to know if a treatment significantly changes the wellbeing of someone with depression. The average person with depression scores a 7.2 on a wellbeing scale with a SD of 1.4 points. The researcher administers the treatment to 25 clients for a month and finds their wellbeing at the end to be 7.7. Assume an alpha level of .05. 

  1. Imagine we know that a treatment actually does have an effect but the researcher concludes there is no effect. 1a. How could we decrease this probability?
  2. Imagine we know that a treatment does not actually have an effect but the researcher concludes there is an effect.
    2a. What error has the researcher made?
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