Prop and Stats Chapter 2

the class width formula is

(max data value)-(min data value)/ number of classes

Identify the steam and the leaf in the following numbers 47, 48, 54

Stem- 4,,5 Leaf- 7,8,4

Class midpoints are found by _____ the ______ class limit to the ____ class limit and ________ the sum by ____

adding lower, upper, dividing, 2

The class boundaries are found by _____ the _____ class limit to the _____ limit in the next class then dividing the sum by ____

adding, upper, lower, 2

A bar graph shows _____ data where the rectangles do ___ not touch, categories on the ___ axis and frequencies on the ____ axis

categorial, not, x, y

A pie chart shows _____ data where each item is a ______

categorial, percentage

A histogram has the ______ _____ or L____ on the ____ axis The frequency is L___ on the ____ axis

class boundary, L1, x L2, Y

A histogram is a graph of _____ data where rectangles are ______,

continuous, touching

A scatterplot shows a ______ between two variables Its coefficient is ____ which is normally between ___ and ____

correlation, R, -1, 1

A frequency distribution is a table that lists ____ ____ and different _____

data items, frequencies

A pare to graph is a bar graph with frequencies in _____ oder; starts with the _____ frequency

descending; highest

The class width is the _____ between two _____ limits in a frequency distribution

difference, lower

a percentage for a class is the ______ of the class ______ by the ____ of all the frequencies times 100%

frequency for a class/ sum of all frequencies times 100

Relative frequency equals....

frequency in category/ total frequency

Outlier has the ______ gap

largest

The upper class limits are the ____ numbers that can belong to each of the different classes (or ____ in the class)

largest, second

A time series graph shows quantitive data collected over a _____ period of _____

long, time

A normal distribution has frequencies start ____, then ______ to one or two high frequencies, and then ______ to a low frequency. The distribution is also approximately _______.

low, increase, decrease, symmetric

A dot plot displays ______ data on a line the frequency of each data item is ______

quantitive, stacked

The lower class limits are the ______ numbers that can belong to each of the different classes (or the ____ number) in a class

smallest, first

The total frequency is total ____ of all the frequencies

sum

The independent variable is on the ____ axis and the dependent variable is on the ______ axis

x, Y