# Study sets matching "stwillott"

Study sets

Diagrams

Classes

Users

significance test or hypothesis test

Null hypothesis (H₀)

Alternative hypothesis (Ha)

One-sided alternative hypothesis

a formal procedure for using observed data to decide between t…

Generally, a statement of no change, no difference, or no rela…

Usually identifies a particular relationship between 2 or more…

An alternative hypothesis that includes either > or <.

significance test or hypothesis test

a formal procedure for using observed data to decide between t…

Null hypothesis (H₀)

Generally, a statement of no change, no difference, or no rela…

pth percentile

cumulative relative frequency graph

z-score

transforming

the value with p percent of the observations less than it

for quantitative data, displays the cumulative relative freque…

tells us how many standard deviations from the mean an observa…

converts the original observations from the original units of…

pth percentile

the value with p percent of the observations less than it

cumulative relative frequency graph

for quantitative data, displays the cumulative relative freque…

point estimate

confidence interval

"level of confidence" or "confidence le…

calculating the margin of error

the value of a statistic from a sample that is used as an esti…

An interval of numbers that provide a set of plausible values…

The expected percent of intervals that will contain the parame…

On the formula packet, the ME is everything after the ± sign.…

point estimate

the value of a statistic from a sample that is used as an esti…

confidence interval

An interval of numbers that provide a set of plausible values…

Sampling distribution of p̂1 - p̂2

conditions for testing a hypothesis abo…

conditions for a confidence interval fo…

Standard error of p1-p2

choose a SRS of size n1 from population 1 with proportion of s…

Random: 2 independent SRSs or 2 groups in a randomized experim…

Random: 2 independent SRSs or 2 groups in a randomized experim…

the estimated standard deviation of the statistic is given by…

Sampling distribution of p̂1 - p̂2

choose a SRS of size n1 from population 1 with proportion of s…

conditions for testing a hypothesis abo…

Random: 2 independent SRSs or 2 groups in a randomized experim…

neither independent nor disjoint (neith…

neither independent nor disjoint (neith…

disjoint (mutually exclusive)... A person…

neither independent nor disjoint (neith…

Randomly choose a person.... Event A: The person does not eat red…

Randomly choose a person.... Event A: The person has a medical de…

Randomly choose a person.... Event A: The person is vegetarian.... E…

Randomly choose a professional athlete.... Event A: The athlete i…

neither independent nor disjoint (neith…

Randomly choose a person.... Event A: The person does not eat red…

neither independent nor disjoint (neith…

Randomly choose a person.... Event A: The person has a medical de…

We want to determine if the distributio…

We want to determine whether two catego…

We want to compare proportions from mul…

What are the hypotheses for a Goodness…

A Chi-Square Goodness of Fit Test will test this

A Chi-Square Test of Independence will test this

A Chi-Square Test of Homogeneity will test this

H₀: The stated distribution of the categorical variable in the…

We want to determine if the distributio…

A Chi-Square Goodness of Fit Test will test this

We want to determine whether two catego…

A Chi-Square Test of Independence will test this

complementary events

P(at least 1)

mutually exclusive events (disjoint eve…

A ∩ B

two disjoint events that together make up the entire sample sp…

1- P(none)

events that can't happen at the same time

A intersect B; the outcomes that are in A and that are also in…

complementary events

two disjoint events that together make up the entire sample sp…

P(at least 1)

1- P(none)

stem & leaf plot or stemplot

back-to-back stem & leaf plot or back-t…

dotplot

histogram

a graph of a distribution of quantitative data in which all bu…

a stem-and-leaf plot or stemplot that is used to compare distr…

a graph of a distribution of quantitative data in which each d…

a graph of a distribution of quantitative data in which nearby…

stem & leaf plot or stemplot

a graph of a distribution of quantitative data in which all bu…

back-to-back stem & leaf plot or back-t…

a stem-and-leaf plot or stemplot that is used to compare distr…

dotplot

bias

sample mean

sample

a display of quantitative data in which each data value is sho…

systematic error, favoring some parts of the population over o…

x̄, the average of a sample

a subset of an entire population used to gather information ab…

dotplot

a display of quantitative data in which each data value is sho…

bias

systematic error, favoring some parts of the population over o…

Explanatory variable

Response variable

Scatterplot

Interpreting Scatterplots

Independent variable that may help explain or predict changes…

Dependent variable that measures an outcome of a study

Graph that shows relationships between 2 quantitative variable…

DUFS- Direction, (Unusual features, if any), Form, and Strength

Explanatory variable

Independent variable that may help explain or predict changes…

Response variable

Dependent variable that measures an outcome of a study

random variable

probability distribution

discrete random variable

the expected value of a random variable…

takes numerical values that describe the outcomes of some chan…

gives the possible values of a random variable and the corresp…

takes fixed set of possible values with gaps between them; pro…

the mean of a random variable is also called...

random variable

takes numerical values that describe the outcomes of some chan…

probability distribution

gives the possible values of a random variable and the corresp…

Parameter

Statistic

Population distribution

Sampling distribution of a statistic

Number that describes some characteristic of the population.

Number that describes some characteristic of a sample.

The distribution of values of the variable among all the indiv…

The distribution of all values of a particular statistic from…

Parameter

Number that describes some characteristic of the population.

Statistic

Number that describes some characteristic of a sample.

sampling distribution of a slope

Conditions that need to be met to perfo…

How do we get degrees of freedom for a…

What's the purpose of a transformation…

choose a SRS of n observations (x,y) from a population with LS…

LINER:... Linear scatterplot... Independent observations... Normal dist…

df = n - 2

when data displays a curved relationship, we can perform a ___…

sampling distribution of a slope

choose a SRS of n observations (x,y) from a population with LS…

Conditions that need to be met to perfo…

LINER:... Linear scatterplot... Independent observations... Normal dist…