Frequency - A frequency distribution polygon Α bar graph Different shapes of distribution According to the poll conducted March 18-20 2005 when

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Organizing Data: Frequency Distribution of Scores Frequency distribution= organized tabulation of scores & the count of the individuals that obtained them it could be presented in the form of a table or a graph
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Ungrouped Frequency Distribution Data Set: 2, 7, 10, 5, 5, 3, 9, 12, 5, 8, 2, 4, 7, 6, 10, 7, 3, 9, 7, 12, 4, 6, 3, 1, 8. N= total number of observations= 25 Total f =total frequency =25 Σ f=N
Background image of page 2
f = frequency p = proportion % = percentage p = f/N % = p*100 = f/N * 100
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Score (X) f p % 12 2 .08 8 11 0 .00 0 10 2 .08 8 9 2 .08 8 8 2 .08 8 7 4 .16 16 6 2 .08 8 5 3 .12 12 4 2 .08 8 3 3 .12 12 2 2 .08 8 1 1 .04 4 Ν= 2 5
Background image of page 4
Grouped Frequency Distribution N=25 Interval f p % 11 - 15 2 .08 8 6 - 10 12 .48 48 1 - 5 11 .44 44 Width of intervals = 5 points
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CONSTRUCTING GROUPED FREQUENCY TABLE find the range of results in the data set (range = highest - lowest +1) decide on the width/number of intervals (choose a simple number for the width) each interval should start or end with a score that is a multiple of the interval width all intervals should be the same width
Background image of page 6
A frequency distribution histogram
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: A frequency distribution polygon Α bar graph Different shapes of distribution According to the poll, conducted March 18-20, 2005 when asked if they "agree with the court's decision to have the feeding tube removed," (Schiavo’s case) 62 % of Democratic respondents agreed, compared to 54 % of Republicans, and 54 % of Independents. These results were displayed along a very narrow scale of 10 percentage points, and thus appeared to show a large gap between Democrats and Republicans/Independents Laid out in this manner, the graph suggests that the gap between the two groups is overwhelming, rather than only 8 percentage points, within the poll's margin of error of +/- 7 percentage points. Also, this presentation obscures the poll's finding that majorities of all the groups sampled approved of the removal of Schiavo's feeding tube. A more accurate presentation of the poll's findings would have looked like this...
View Full Document

This note was uploaded on 11/12/2009 for the course PSY 3301 taught by Professor Staff during the Fall '08 term at Texas State.

Page1 / 12

Frequency - A frequency distribution polygon Α bar graph Different shapes of distribution According to the poll conducted March 18-20 2005 when

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online