Interpreting and Utilizing Clinical Statistics
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T:FA pooly designed study can not be statistically evaluated | show 🗑
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T:F, A poorly appied statistical test can never be evaluated | show 🗑
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What type of statistics makes an assumption from a sample to a population | show 🗑
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show | Descriptive
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P-value and Confidence interval are used in what type of statistics | show 🗑
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show | central tendency and variability
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Average for a set of numbers | show 🗑
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middlemost value ina set of ranked data | show 🗑
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most frequently occuring number in a data set | show 🗑
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show | range, standard deviation, standard error of the mean (SEM)
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What measure of variability relates the sample to the population | show 🗑
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show | yes
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show | No
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T:F, Causality and certainty are synonomous | show 🗑
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What does the null hypothesis state? | show 🗑
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What type of error is described by "A false positive" | show 🗑
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show | when you fasly conclude that there is no difference when in fact there really is. false negative
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What type of error is seen when you reject the null when you really should have accepted it | show 🗑
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What is alpha | show 🗑
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show | 5%
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show | Flase. Both need to be established a priori
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show | alpha
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What is the risk of making a type 2 error | show 🗑
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How would you calculate Beta | show 🗑
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What is usually the normal designation for a value of beta | show 🗑
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show | true
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What is another name for hpothesis of no difference | show 🗑
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show | increase alpha (significance level) or increase sample size OR make assumptions (specifically one sided assumptions) or reduce variability)
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Which type of tailed test accounts for the possibility that the drug will be inferior to the control | show 🗑
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What's one example of a downfall of a one-sided test | show 🗑
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LDL cholesteril is an example of what kind of measurement | show 🗑
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show | 1 SD- 68.3%, 2 SD- 95.5%, 3SD- 99.7%
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What is the mean and SD in a normal distribution? | show 🗑
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show | False. This will happen as the sample size INCREASES
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show | NO. normal distribution is determined by sample size. there has to be a sample size of at least 30 to be normally distributed
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show | parametric = normall distributed, continuous data. Nonparametric = not nor. dist., nominal data or ordinal data
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show | p-value
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the p-value is the risk of experiencing what type of error, a fale positive or a fale negative? | show 🗑
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How would you interpret a p<.05. What does ttha mean? How would you describe that value in words? | show 🗑
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If the p-value is to high, what should we do to the null hypothesis | show 🗑
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show | FALSE! The p-value infers nothing about clinical significance! It relates to statistical significance!
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show | post hoc
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show | FaLSE, the larger the sample size the more narrow the confidence interval
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show | small
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What value gives you statistical significance | show 🗑
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show | CI
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show | (High - low)/ high
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What is the equation for absolute risk reduction? | show 🗑
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what is the equation for number needed to treat | show 🗑
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What is the relative risk reduction? | show 🗑
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show | absolute differences between the probabilities of the treatment even rate and control even rate
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show | the number if subjects needed to treat over a period of time in order to see the benefits of a therapy in 1 subject
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show | NNT
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show | the number needed to treat before you experience one adverse reaction
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show | 1-ARR
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show | Smaller sample sizes detect a large difference. large sample sizes detect small differences
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