probability
order does not matter for permutations or combinations?
combinations
what does a z score tell us
how many standard deviations the data point lies away from the mean
which is not a point estimator: x bar, p bar, or μ
μ
which is an example of an interpretation of a confidence interval?
I am 90% confident that the population mean is between 18.2 and 20.3
a coin is flipped twice. How many sample points are in the sample space
4
find the mean of 2, 10, 12, 9, 15, 17
10.83333
define sampling distribution
"a probability distribution of all possible values of a point estimator"
what is the formula for margin or error?
z (sigma/sq(n))
what is the overlap section of a Venn diagram called
intersection of A and B
true or false- x bar is the mean of the population
false
when do we use the finite pop corrector to find standard error?
n/N > 0.05
true or false : null and alternate hypotheses are always opposites of each other
true
when do we use Bayes theorem
for conditional probability
which is not a measure of spread? variance, standard deviation, or median
median
what is p bar
sample proportion
what is the probability that chi squared is greater than 11.7 on 2 degree of freedom?
0.00288
true or false: playing football is mutually exclusive from getting As on tests
false
The 75th percentile of a given data set is m, so 75% of the set's observations are....
less than or equal to m
true or false: an unbiased estimator is considered accurate
true
when do we use the t distribution