Study sets, textbooks, questions
Upgrade to remove ads
Biostats Normal Distribution, Confidence Intervals, Hypothesis Testing Exam 1
Terms in this set (20)
statistical distribution that is for continuous variables( ratio and interval); all measures of central tendency are equal and has a known mean and standard deviation
standard normal distribution
Deviation of an observation from the mean in terms of standard deviations
On a normal distribution, how many of the values fall in one standard deviation from the mean?
On an normal distribution how many of the values fall within 2 standard deviations from the mean?
On a normal distribution, how many of the values fall within 3 standard deviations from the mean?
Distribution that is used for categorical values (nominal) with two possible outcomes (alive or dead, treatment success vs. failure)
What are the 3 main tenets of the central limit theorem?
1. the mean of all sample means is equal to the population mean
2. the standard deviation of the sample means will be smaller than the population standard deviation and will be equal to the standard deviation of the population divided by the square root of the sample size.
3. As sample size increases, the distribution of the sample means approaches the normal distribution
The process of analyzing data from a sample to infer the true values or true effects in the population
Which is more likely to result in a normal distribution: a sample size of 10 patients or sample size of 1000 patients?
What is a type 1 error?
rejecting the null when it is true
What is a type b error?
failing to reject the null when the null is false
If beta is 0.2, what is the power level?
if alpha is 0.1, what is the confidence level
Supposed a coffee vending machine claims it dispenses an 8 oz cup of coffee. You have been using the machine for 6 months, but recently it seems the cup isn't as full as it used to be. You plan to conduct a statistical hypothesis test. What is the null hypothesis?
there is no change in volume of coffee dispensed
Supposed a coffee vending machine claims it dispenses an 8 oz cup of coffee. You have been using the machine for 6 months, but recently it seems the cup isn't as full as it used to be. You plan to conduct a statistical hypothesis test. What is the alternative hypothesis?
there is a change in the volume of coffee dispensed
Do tests of difference look in one or both directions?
both, two tailed
Do tests of superiority look in one or both directions?
Which hypothesis test looks to see whether the difference in two quantities is zero?
tests of difference
Which hypothesis test looks to see if one quantity is greater or less than the other?
test of superiority
What is statistical significance? how is that different from clinical significance?
statistical significance means you can reject the null; clinical significance will change practice
Recommended textbook explanations
Statistical Techniques in Business and Economics
Douglas A. Lind, Samuel A. Wathen, William G. Marchal
The Practice of Statistics for the AP Exam
Daniel S. Yates, Daren S. Starnes, David Moore
A First Course in Probability
A Survey of Mathematics with Applications
Allen R. Angel, Christine D. Abbott, Dennis C. Runde
Other sets by this creator
Complementary and Alternative Medicine Self Care E…
Patient Assessment Self Care Exam 1
Legal and Regulatory Issues in Self-Care Exam 1
Wound Care Self Care Exam 1
Other Quizlet sets
ECN-240 Quiz 14-01
MPJE AL Practice Test
2209: Unit 3 Assignment