#### Study sets matching "statistics chapter 3"

#### Study sets matching "statistics chapter 3"

measure of center

mean

median

mode

the central position of the data set; "typical" value in a dat…

average value; balancing point of a data set

middle value of a data set

most common value of a data set

measure of center

the central position of the data set; "typical" value in a dat…

mean

average value; balancing point of a data set

Arithmetic Mean

Population Arithmetic Mean

Sample Arithmetic Mean

Mean

Computed by adding all the values of the variable in the data…

Computed using all the individuals in a population (a paramete…

Computed using sample data (a statistic)

The arithmetic mean

Arithmetic Mean

Computed by adding all the values of the variable in the data…

Population Arithmetic Mean

Computed using all the individuals in a population (a paramete…

parameter

statistic

Bias

Variability

is a number that describes a population. A ____ is a fixed num…

is a number that describes a sample. The value of this is know…

is consistent, repeated deviation of the sample statistic from…

describes how spread out the values of the sample statistic ar…

parameter

is a number that describes a population. A ____ is a fixed num…

statistic

is a number that describes a sample. The value of this is know…

Bimodal distribution

First quartile

Interquartile Range

Lower inner fence

A distribution that has two modes

The value in a ranked data set such that about 25% of the meas…

The difference between the third and the first quartiles

A value in a data set that is 1.5(IQR) below the first quartile

Bimodal distribution

A distribution that has two modes

First quartile

The value in a ranked data set such that about 25% of the meas…

Response variable

Explanatory variable

Scatterplots

When the variables aren't dependent, th…

Measures the outcome of a study, dependent variable, y

Attempts to explain observed outcomes, indepdent variable, x

Show the relationship betweeen two quantitive variables (bivar…

Independent, x

Response variable

Measures the outcome of a study, dependent variable, y

Explanatory variable

Attempts to explain observed outcomes, indepdent variable, x

Quantitative variables

Categorical variables

Response variable

Explanatory variable

Numerical values

Values expressed in categories

Measures the outcome of a study; dependent variable; y

Explains observed outcomes; independent variable; x

Quantitative variables

Numerical values

Categorical variables

Values expressed in categories

mode

median

mean

weighted average

value that occurs most frequently in a data set

central value of an ordered distribution

average of all the values in a data set

average with more importance assigned to some of the numbers.…

mode

value that occurs most frequently in a data set

median

central value of an ordered distribution

bimodal

boxplot

Chebyshev's Theorem

co-efficient of variation

a data set with 2 modes

a graph used to represent a data set when the data set contain…

theorem stating that the proportion of values from a data set…

standard deviation divided by the mean with the result express…

bimodal

a data set with 2 modes

boxplot

a graph used to represent a data set when the data set contain…

Skewness

Kurtosis

Mesokurtic

Leptokurtic

data that does not have normal distribution

the peakedness or flatness of a distribution of data

normal distribution

Which type of distribution is peaked

Skewness

data that does not have normal distribution

Kurtosis

the peakedness or flatness of a distribution of data

Sample mean

population mean

sample median

population median

the sum of the observation divided by n

the mean of the entire population

the middle value of the ordered data

the middle value of an entire population

Sample mean

the sum of the observation divided by n

population mean

the mean of the entire population

Statistic

Parameter

Mean

The Sample Mean

A characteristic or measure obtained by using the data values…

A characteristic or measure obtained by using all the data val…

The sum of the values, divided by the total number of values.

Denoted by x̄ (pronounced X-bar) is calculated by using sample…

Statistic

A characteristic or measure obtained by using the data values…

Parameter

A characteristic or measure obtained by using all the data val…

___ ___ refers to the value around whic…

___ refers to the degree to which value…

___ ___ ___ refers to the particular wa…

The three key measures of central tende…

Central tendency

Variability

Shape of distribution

Mode, median, mean

___ ___ refers to the value around whic…

Central tendency

___ refers to the degree to which value…

Variability

Response Variable

Explanatory Variable

scatterplot

Interpreting scatterplots

measure the outcome of a study.

may help explain or influence changes in a response variable.

shows the relationship between two quantitative variables meas…

1) the direction ... 2) the form ... 3) the strength of the relation…

Response Variable

measure the outcome of a study.

Explanatory Variable

may help explain or influence changes in a response variable.

Average

Mode

Median

Sample mean, x

One number used to describe the entire sample or population

the value that occurs most frequently

The central value of an ordered distribution. If there is an e…

the sum of all values of entries in a sample population divide…

Average

One number used to describe the entire sample or population

Mode

the value that occurs most frequently

Response Variable

Explanatory Variable

Scatterplot

Positive Association

Measures an outcome of a study

Helps explain or influences changes in a response variable

A graphed cluster of points each of which represents the value…

Data points that generally go upward from left to right, somew…

Response Variable

Measures an outcome of a study

Explanatory Variable

Helps explain or influences changes in a response variable

Parameter

population mean

sample mean

statistic

A characteristic of a population.

population mean = sum of all the values in the population / nu…

"x bar"... sample mean = sum of all the values in the sample / nu…

A characteristic of a sample.

Parameter

A characteristic of a population.

population mean

population mean = sum of all the values in the population / nu…

3.1 Measures of Central Tendency: Mean

3.1 Measures of Central Tendency: Median

3.1 Measures of Central Tendency: Mode

3.1 Measures of Central Tendency: Resis…

- The average.... - Used when data are quantitative and the frequ…

- The data value "in the middle"... - Used when the data are quan…

- The most frequently occurring value... - Can be applied to both…

Resistant statistic is a numerical summary (statistic or param…

3.1 Measures of Central Tendency: Mean

- The average.... - Used when data are quantitative and the frequ…

3.1 Measures of Central Tendency: Median

- The data value "in the middle"... - Used when the data are quan…

Classes

Histogram

Number of class intervals

Class Width

frequency distribution for interval data by counting the numbe…

provides information about how numbers are distributed

= 1+ 3.3 log (n)

= Largest Observation- Smallest Observation/ Number of classes

Classes

frequency distribution for interval data by counting the numbe…

Histogram

provides information about how numbers are distributed

Scatterplot

Explanatory Variable

Response Variable

DOFS

Displays the relationship between 2 quantitative variables... 1 v…

When x helps predict y, goes on x-axis

When y is predicted by x, goes on y axis

Direction, Outliers, Form, Strength

Scatterplot

Displays the relationship between 2 quantitative variables... 1 v…

Explanatory Variable

When x helps predict y, goes on x-axis