stats concepts

wh

type 1 error

false positive

we (reject/fail to reject) the

null hypothesis

type 2 error

false negative

a type 1 error is ___ the null when the null is ____

failing to reject, false

a type 2 error is ___ the null when the null is ____

rejecting, true

with proportions, use a

z test/interval

with confidence intervals for means, use a

t test/interval

what is the large counts condition

sucsesses and failures are 10 or more

what is the 10% rule

no more than 10% of the N

if P is less than a, we have…

we have convincing evidence

if P is greater than a, we have…

no convincing evidence

if p is less than a, we ____ the null hypothesis

reject

if p is greater than a, we ___ the null hypothesis

fail to reject

if we have no convincing evidence, we ___ the null

fail to reject

if we have convincing evidence, we ___ the null

reject

in a significance test, what is a p value

the probability of getting a result as extreme as observed, given the null is true

if we only have sample size, how can we know the population is normally distributed

if sample size is greater than or equal to 30

if we have a table or a graph, how can we know the population is normally distributed

looking at a box graph and making sure there is no skew or outliers

if we have proportions and sample size, how can we know the population is normally distributed

if the successes and failures are greater than or equal to 10

the conditions for CI and Sig. tests are or are not the same

they are Not the same

to test for the difference in two proportions, use a

to test two hypotheses about a proportion, use a

in the do section of a 2propZint, write down

z and Pc

z is the

test statistic

how do you find p̂_c ?

x̅¹ + x̅²

n1 +n2

for a 2sampleZtest, what is the parameter

0

when finding p̂_c, the sample proportions are _____

whole numbers

in a 2sampleZtest, the unlabeled p is

p̂_c

in a 2sampleZtest, where do you plug in z to find p?

normalCDF

IQR is

q3-q1

what is mean

the average of all the data

what is median

midpoint of a distribution

how do we define an outlier?

1.5 iqr

in statistics, what is a block?

what does the ∪ symbol mean

union

what does the ⋂ symbol mean

intersection, middle of the venn diagram

what is p=(A⋂ B)

a AND b, at the same time

this graph is ____ skewed

left skewed