Nursing Statistics - Wk 4-13 Questions and Answers 100%
Correct
a and p-value correct answer -if p-value < a, reject H0
-if p-value > or = a, do not reject H0
alternative hypothesis correct answer a claim about the population that is contradictory to H0 (null) and
what we conclude when we reject H0; what we're trying to prove
analysis of variance (ANVOA) correct answer a parametric statistical technique conducted to determine
whether a statistically significant difference exists among the means of three or more groups
beyes' theorem correct answer provides a way to update beliefs or probabilities based on new evidence;
relates conditional probabilities, of an event occurring given that another event has already occurred
central limit theorem correct answer says that if you repeatedly draw samples of a given size and
calculate their means, those means tend to follow a normal distribution
chi square correct answer inferential statistical test calculated to examine differences among groups
with variables measured at the nominal level
cluster sampling correct answer a list of all states, cities, etc. associated with elements of the population
is developed and they are randomly selected to form a sample; representativeness increases with
sample size; quantitative and outcomes
confidence intervals correct answer a range computed using sample statistics to estimate an unknown
population parameter with a stated level of confidence;
a + CL = 1
confidence intervals correct answer determines how closely the sample mean approximates the
population mean; built using the standard error of the mean
, continuous random variable correct answer value on a continuous scale; ex. the height of a student
convenience sampling correct answer enrolling study participants who meet sample criteria, are
accessible, and are willing to participate in a study; all methods of research
correlation coefficient correct answer the mathematical expression of the relationship or association
studied
degrees of freedom correct answer the number of independent pieces of information that are free to
vary in order to estimate another piece of information; in the case of the CI, the df are (n-1)
difference scores correct answer aka deviation score - indicates the extent to which a score deviated
from the mean; obtained by subtracting the mean from each value
direction correct answer relationships are interpreted in terms of direction and strength; expressed as
either positive or negative
discrete random variable correct answer singular numbers, often integers (0,1,2); ex. the number of
fatal accidents per week in a given state
empirical rule correct answer If X is a random variable and has a normal distribution with mean u and SD
o, then the empirical rule states the following:
-About 68% of the values lie between z-scores of -1 and 1.
-About 95% of the values lie between z-scores of -2 and 2.
-About 99.7% of the values lie between z-scores of -3 and 3.
error bound for a population mean (EBM) correct answer maximum expected difference between the
sample mean and the true population mean; calculated by multiplying t with SE
estimation correct answer involves using sample data to estimate population parameters; point (single
value estimate) or interval (range of values)
Correct
a and p-value correct answer -if p-value < a, reject H0
-if p-value > or = a, do not reject H0
alternative hypothesis correct answer a claim about the population that is contradictory to H0 (null) and
what we conclude when we reject H0; what we're trying to prove
analysis of variance (ANVOA) correct answer a parametric statistical technique conducted to determine
whether a statistically significant difference exists among the means of three or more groups
beyes' theorem correct answer provides a way to update beliefs or probabilities based on new evidence;
relates conditional probabilities, of an event occurring given that another event has already occurred
central limit theorem correct answer says that if you repeatedly draw samples of a given size and
calculate their means, those means tend to follow a normal distribution
chi square correct answer inferential statistical test calculated to examine differences among groups
with variables measured at the nominal level
cluster sampling correct answer a list of all states, cities, etc. associated with elements of the population
is developed and they are randomly selected to form a sample; representativeness increases with
sample size; quantitative and outcomes
confidence intervals correct answer a range computed using sample statistics to estimate an unknown
population parameter with a stated level of confidence;
a + CL = 1
confidence intervals correct answer determines how closely the sample mean approximates the
population mean; built using the standard error of the mean
, continuous random variable correct answer value on a continuous scale; ex. the height of a student
convenience sampling correct answer enrolling study participants who meet sample criteria, are
accessible, and are willing to participate in a study; all methods of research
correlation coefficient correct answer the mathematical expression of the relationship or association
studied
degrees of freedom correct answer the number of independent pieces of information that are free to
vary in order to estimate another piece of information; in the case of the CI, the df are (n-1)
difference scores correct answer aka deviation score - indicates the extent to which a score deviated
from the mean; obtained by subtracting the mean from each value
direction correct answer relationships are interpreted in terms of direction and strength; expressed as
either positive or negative
discrete random variable correct answer singular numbers, often integers (0,1,2); ex. the number of
fatal accidents per week in a given state
empirical rule correct answer If X is a random variable and has a normal distribution with mean u and SD
o, then the empirical rule states the following:
-About 68% of the values lie between z-scores of -1 and 1.
-About 95% of the values lie between z-scores of -2 and 2.
-About 99.7% of the values lie between z-scores of -3 and 3.
error bound for a population mean (EBM) correct answer maximum expected difference between the
sample mean and the true population mean; calculated by multiplying t with SE
estimation correct answer involves using sample data to estimate population parameters; point (single
value estimate) or interval (range of values)
