Stats Exam Review

You have a paired group and assuming non-gaussian or not normally distributed data, which test is the most appropriate?
ANOVA
Two tailed T-test
Mann-Whitney Test
Wilcoxon matched-pairs signed rank test
What is the calculation for sensitivity?
A/(A+B)
A/(A+C)
D/(B+D)
D/(A+D)
What does C tell us?
False positive
False negative
True positive
True negative
Which one tells us a true negative
A
B
C
D
Which number is the posttest probability?
98.3%
99.8%
0.035%
14.8%
Categorized in ordered groups with equivalent intervals between the variables but zero point is meaningful
Binomial
Ratio
Interval
Ordinal
Which of the following is not sensitive to outliers
Mean
Median
Mode
Ratios
Which of the follow express rank and order matters?
Nominal
Binomial
Ordinal
Continuous
If you increase the number of your sample size from 100 to 400, what would happen to your SEM?
Decrease by x2
Stay the same
Increase x4
Decrease by x4
Suppose a clinically accepted value for mean fasting glucose in females aged 20-29 is 100 mg/dL and the standard deviation is 10 mg/dL. The fasting glucose for a 25-year-old female was 120 mg/dL. How many standard deviations above the mean is the subject's fasting glucose?
1
2
3
4
If you have a large SD, what does that mean about your data?
Your data is widely scattered and sample mean is likely further from the population mean
Your data is tight w/ little variability and it is likely to be closer to the population mean
Your data is dispersed and is likely to represent the population
Your data is centered around the mean and likely does not represent the population mean
Which would have the widest confidence interval size?
99%
95%
80%
75%
What is the computed from the data and is a measure of the strength of the evidence?
The null hypothesis
T-test
SD
P value
What results from a very low alpha (significance level lower than 0.05)?
You will make less type I errors
You will make more type I errors
You will make less type II errors
More false positive errors
 
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