Business And FinanceAccountingStatistics Chapter 8
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Statistics Chapter 8

Xeni Ramirez avatar Xeni Ramirez
7 September 2022
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14 test answers

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question
What position in the distribution corresponds to a z-score of z=+2.00?
answer
above the mean by a distance equal to 2 standard deviations
question
Which of the following z-score values represents the location closest to the mean?
answer
z=+0.50
question
Any individual with a positive z-score has a score greater than the mean.
answer
True
question
For a population with a mean of 80, any score greater than 80 will have a positive z-score.
answer
True
question
Which of the following correctly describes the effect of increasing the alpha level (for example, from .01 to .05)?
answer
Increase the likelihood of rejecting H0 and increase the risk of a Type 1 error.
question
Which of the following is an accurate definition of Type 1 error?
answer
Rejecting a true null hypothesis
question
Is a standardized score necessarily a z-score?
answer
No
question
Any individual with a positive z-score has a score greater than the mean.
answer
True
question
The distribution of sample means
answer
will be normal if either the population is normal or the sample size is n?30
question
The mean for the distribution of sample means is always equal to the mean for the population from which the samples are obtained.
answer
True
question
What is the consequence of Type 1 error?
answer
Concluding that a treatment has an effect when it really has no effect
question
What is the consequence of a Type II error?
answer
Concluding that a treatment has no effect when it really does
question
Which of the following will increase the power of statistical test?
answer
change the sample size from n=25 to n=100
question
In general, the null hypothesis states that the treatment has no effect on the population mean.
answer
True