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Author Question: The mean is represented by which score in the following frequency distribution? X f 12 3 11 0 10 1 9 ... (Read 17 times)

KWilfred

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on: Jul 8, 2018
The mean is represented by which score in the following frequency distribution? X f 12 3 11 0 10 1 9 1 8 1 7 1
 
  a. 12
  b. 10
  c. 9
  d. 7

Question 2

A Type I error could occur for which of the following reasons?
 
  a. Large difference between groups
  b. Large sample size
  c. Lenient level of significance
  d. Normal distribution


cuttiesgirl16

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

ANS: B
The mean is the sum of the scores divided by the number of scores being summed. In this example, the sum of scores equals 70, and the number of scores being summed equals 7. Seventy divided by 7 equals 10.

Answer to Question 2

ANS: C
There is a greater risk of Type I error with a 0.05 level of significance than with a 0.01 level of significance. As the level of significance becomes more extreme, the risk of a Type I error decreases.
The greater the difference between groups the less likelihood of a Type I error.
A Type I error is probably less likely with a large sample.
Normal distribution is not going to cause a Type I error.


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