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Author Question: In a data set that has a normal distribution what percent of scores will be within two standard ... (Read 89 times)

laurencescou

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on: Jul 8, 2018
In a data set that has a normal distribution what percent of scores will be within two standard deviations above or below the mean?
 
  a. 34
  b. 68
  c. 95
  d. 99

Question 2

In a study to examine motivational techniques to help adolescent smokers to quit smoking, the null hypothesis states that the intervention will have no effect on this population. The researcher establishes a level of significance of 0.01.
 
  When analyzing the data, the researcher concludes that there is a significant difference between subjects receiving the intervention and those who do not. In this study, a Type I error means there is a:
  a. 1 chance that the conclusion is wrong.
  b. 1 chance that the conclusion is correct.
  c. 99 chance that the conclusion is wrong.
  d. 99 chance that the null hypothesis is correct.


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lorealeza

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Reply #1 on: Jul 8, 2018
Answer to Question 1

ANS: C

Answer to Question 2

ANS: A


laurencescou

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Reply 2 on: Jul 8, 2018
Excellent

aliotak

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Reply 3 on: Yesterday
Wow, this really help

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