HEALTHCARE STATISTICS WGU C431
EXTRA QUIZ QUESTIONS AND VERIFIED
ANSWERS.
When the subject in a study are not representative of the population, this is
a limitation referred to as ________
A) Measurement Error
B) Probability Bias
C) Sampling Bias
D) Recall Bias
E) Publication Bias - CORRECT ANSWER -C Sampling Bias
Researchers selected α < 0.01 for a study comparing two different
diagnostic procedures for ankle injuries (X-ray vs. history/physical exam).
What is the chance that the resulting test statistic will represent normal
variability?
A. 0%
B. 1%
C. 10%
D. 99%
E. Cannot be determined with the information provided - CORRECT ANSWER -
B) 1%
Alpha is ___.
, A. the probability a Type I error
B. the size of a sample
C. the effect size is a sample size calculation
D. the level of power
E. incorrectly failing to reject the null hypothesis - CORRECT ANSWER -A) the
probability a Type 1 error
Researchers performed a study comparing Treatment A and Treatment B.
The calculations they performed indicated that Treatment A was
significantly better than Treatment B. However, they later discovered an
error in data collection and determined that Treatment A and Treatment B
were, in fact, equivalent. What mistake did they make?
A. There was no mistake made.
B. They incorrectly rejected the null hypothesis, which is a Type I error.
C. They incorrectly rejected the null hypothesis, which is a Type II error.
D. They incorrectly failed to reject the null hypothesis, which is a Type I
error.
E. They incorrectly failed to reject the null hypothesis, which is a Type II
error. - CORRECT ANSWER -B) They incorrectly rejected the null hypothesis,
which is a Type I error.
In a normal distribution ___ of all normally occurring results will fall
below the median.
A. 25%
B. 67%
EXTRA QUIZ QUESTIONS AND VERIFIED
ANSWERS.
When the subject in a study are not representative of the population, this is
a limitation referred to as ________
A) Measurement Error
B) Probability Bias
C) Sampling Bias
D) Recall Bias
E) Publication Bias - CORRECT ANSWER -C Sampling Bias
Researchers selected α < 0.01 for a study comparing two different
diagnostic procedures for ankle injuries (X-ray vs. history/physical exam).
What is the chance that the resulting test statistic will represent normal
variability?
A. 0%
B. 1%
C. 10%
D. 99%
E. Cannot be determined with the information provided - CORRECT ANSWER -
B) 1%
Alpha is ___.
, A. the probability a Type I error
B. the size of a sample
C. the effect size is a sample size calculation
D. the level of power
E. incorrectly failing to reject the null hypothesis - CORRECT ANSWER -A) the
probability a Type 1 error
Researchers performed a study comparing Treatment A and Treatment B.
The calculations they performed indicated that Treatment A was
significantly better than Treatment B. However, they later discovered an
error in data collection and determined that Treatment A and Treatment B
were, in fact, equivalent. What mistake did they make?
A. There was no mistake made.
B. They incorrectly rejected the null hypothesis, which is a Type I error.
C. They incorrectly rejected the null hypothesis, which is a Type II error.
D. They incorrectly failed to reject the null hypothesis, which is a Type I
error.
E. They incorrectly failed to reject the null hypothesis, which is a Type II
error. - CORRECT ANSWER -B) They incorrectly rejected the null hypothesis,
which is a Type I error.
In a normal distribution ___ of all normally occurring results will fall
below the median.
A. 25%
B. 67%
