WGU C955 PROBABILITY AND STATISTICS OBJECTIVE ASSESSMENT 2 2026 SOLVED QUESTIONS ANSWERS GRADED A PLUS HYPOTHESIS TESTING HANDBOOK

WGU C955 PROBABILITY AND STATISTICS
OBJECTIVE ASSESSMENT 2 2026 SOLVED
QUESTIONS ANSWERS GRADED A PLUS
HYPOTHESIS TESTING HANDBOOK

◉ IQR.
Answer: Measures of spread


◉ Standard deviation.
Answer: Measures of spread


◉ Histogram.
Answer: A graphical representation of data distribution


◉ Voluntary sample.
Answer: Members of the sample may choose not to respond. Similar
to Non Response.


◉ Placebo effect.
Answer: A beneficial effect produced by the belief of the
patient/subject, not by the intervention itself.

, ◉ Two way table.
Answer: A graphical representation of C -> C


◉ P(A or B).
Answer: P(A) + P(B) - P(A and B)


◉ Extrapolation.
Answer: Making predictions outside of the range of your data. This is
generally a bad idea.


◉ Closed question.
Answer: A question with limited choices, e.g. multiple choice or
yes/no. Easier to analyze statistically.


◉ Only way to prove causation.
Answer: Experiments, because they account for lurking variables.


◉ Experimenter effect.
Answer: When the persons running an experiment affects its results
by influencing the subjects inadvertently.