SCMA 3080 Modules 5-7 Exam with complete solutions latest version.

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SCMA 3080 Modules 5-7 Exam with
complete solutions latest version




True or False: there are two research hypothesis, and two statistical hypothesis -
CORRECT ANSWER-False - one research hypothesis, and two statistical

What is a statement of the expected/predicted/hoped for outcome of a study? -
CORRECT ANSWER-Research hypothesis

What are statistical hypothesis? - CORRECT ANSWER-Two mutually exclusive and
exhaustive mathematical statements about the outcome of the analysis

What is Ho?

Ho = - CORRECT ANSWER-Null hypothesis

Ho = Xa = Xb

What is Ha?

Ha = - CORRECT ANSWER-Alternate hypothesis

Ha = Xa ≠ Xb (non-directional)

Directional: Xa < Xb or Xa > Xb

In ____________________ statistics we are always evaluating the null hypothesis. -
CORRECT ANSWER-Inferential

If p is less than 𝛼, the result is statistically significant/insignificant, and we fail to
reject/reject the Ho - CORRECT ANSWER-Significant; reject Ho

There is error in both directions if the alternate hypothesis is... - CORRECT ANSWER-
Non-directional

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Does this drug cause weight loss? Group A = control, B = treatment.

Is this directional or non-directional?

What are the statistical hypotheses for this experiment? - CORRECT ANSWER-
Directional

Ho xa = xb
Ha xa xb

A false positive is what type of error? - CORRECT ANSWER-Type I error

To reject the Ho when it is true is what type of error? - CORRECT ANSWER-Type I
error

Telling a man he is pregnant when he is not is what type of error? - CORRECT
ANSWER-Type I error

Telling a pregnant woman she is not pregnant is what type of error? - CORRECT
ANSWER-Type II error

If you do not reject the Ho when it is false, what type of error are you making? -
CORRECT ANSWER-Type II error

False positive = - CORRECT ANSWER-Type I error

False negative = - CORRECT ANSWER-Type II error

Lack of a random sample can cause what kind of error? - CORRECT ANSWER-Type I
error

Too liberal of an alpha value (ex. a = 0.10) can cause what type of error? - CORRECT
ANSWER-Type I error

Improper use of a one-tailed test can cause what type of error? - CORRECT ANSWER-
Type I error

Lack of sufficient power (N too small) can cause what type of error? - CORRECT
ANSWER-Type II error

A too conservative of an alpha value (ex. a = 0.01) can cause what type of error? -
CORRECT ANSWER-Type II error

If the treatment effect was not properly applied, what error can this cause? - CORRECT
ANSWER-Type II error


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