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Epi/Biostat Review Flashcards | StudBud

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Epi/Biostat Review

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Epi and Biostat Review Medical Students

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Questions 8

Answers

1
Which is a correct statement about hypothesis testing?
p value is the (beta) type II error
Type I error: probability of falsely rejecting the null
Type I is false negative error
Type II error: probability of falsely rejecting the null
2
Your research hypothesis
critical hypothesis
null hypothesis
alternative hypothesis
alpha hypothesis
3
Which statement is correct?
1 tailed test are used when your data is skewed
A 2 tailed test is rarely used
Hypothesis tested in 2 directions is 2 tailed test
1 tailed test is always based on a negative critical value
4
Which is a correct statement about the SE (standard error)
SE = √SD/n
Larger SE, more reliable the sample statistic
The larger the sample, the smaller the SE
Less variability in the population, the larger the SE
5
Which of the following is the study of disease determinants and their prevalence?
Health Policy
Community Health
Epidemiology
Biostatistics
6
Which one of the following results would you be most confident in that there is an association
OR = 0.95 (95% CI = 0.70 - 1.29)
OR = 9.85 (95% CI = 0.89 - 36.48)
OR = 1.91 (95% CI = 1.02 - 2.89)
OR = 1.89 (95% CI = 1.81 - 1.95)
7
Which is a true statement about Confidence Intervals
Small samples usually lead to narrow confidence intervals
Expresses extent of potential variation in point estimate
Cannot be used to determine statistical significance
8
Which is the false statement
Statistics are used to estimate a parameter
Data describing a population are referred to as parameters
Data describing a sample are referred to as statistics
Most research involves populations not samples