Chapter 2: Presenting Data in Tables and charts

Question 1

What is numerical data

Answer 1

raw data that is collected in any order (how it was collected)

Question 2

what is ordered array

Answer 2

taking the data and sorting it from smallest to largest

Question 3

what are the ways to organize data

Answer 3

1. raw data
2. ordered array
3. steam and leaf
4. frequency distribution?

Question 4

what are the ways to display the data

Answer 4

frequency distribution then showing it in

1. tables
2. charts - histograms, polygons, ogive

Question 5

What are the steps in organizing numerical data

Answer 5

1. data in raw form (as collected)
2. data in ordered array form smallest to largest
3. stem and leaf display
4. create a frequency distribution

Question 6

what is frequency distribution

Answer 6

starts to show frequency

then you take that information and put it in tables and histograms, polygons and ogive

Question 7

How do you tabulate numerical data

Answer 7

use frequency distribution

Question 8

what are the steps in frequency distribution

Answer 8

1. sort the raw data in ascending order (ordered array) in a table
2. find range (largest number - smallest number)
3. select number of classes (usually between 5 and 15) classes are ranges
4. how wide - class interval (take the range / the number of classes)
5. determine class boundaries (limits)
   (10, 20, 30 , 40, 50, 60)
6. Compute class midpoints (15,25,35,45,55)
7. compute observations and assign to classes

Question 9

How do you calculate the frequency

Answer 9

it is how many how up in that class (how many numbers are there)

Question 10

how do you calculate relative frequency

Answer 10

frequency / total amount of numbers being analyzed

Question 11

how do you calculate the percentage in the distribution frequency chart

Answer 11

show relative frequency as a %

so if you have .15 relative frequency you have 15%

Question 12

how do you display a frequency distribution

graphic numerical data

Answer 12

histogram, frequ3ency polygon, cumulative frequency . ogive

add pic

Question 13

Describe histogram

Answer 13

y0axis contains true origin
shows class boundaries and class midpoints
no gaps between bars
shows how many are in each class

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Question 14

describe frequency polygon

Answer 14

taking the midpoints and charting them

midpoint had 3 (for example)

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Question 15

describe the cumulative frequency

Answer 15

under 50 = 90

add more info here
add pic

Question 16

describe the ogive

Answer 16

cumulation of prior graph (cumulative frequency)???

starts at boundary
cumulative percentages

add pic
add more info

Question 17

what is bivariate numerical data

Answer 17

two numerical variables

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Question 18

what is univariate

Answer 18

one variable

add pic