Chp 14 Descriptive Statistics Part 1 (student)-1

# Chp 14 Descriptive Statistics Part 1 (student)-1 -...

This preview shows pages 1–11. Sign up to view the full content.

Descriptive Statistics Chapter 14

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

View Full Document
Research Process
Why are statistics important?

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

View Full Document
Analyzing Data Descriptive Statistics (Chp 14) Summarize and describe the data Inferential Statistics (Chp 15) Allows the researcher to determine whether  differences in groups are due to the effects of the  IV or more likely due to chance
Notation X = mean N = number of participants  = sum Σ s ²= variance s= standard deviation SS= sum of squares  _

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

View Full Document
Overview Frequencies  Central Tendency Variability Z-scores
Analyzing Nominal and Ordinal  Data Example: Kristin conducted a study to see if expert  testimony affects juror decisions in a murder case.   One hundred participants read a case and decide  on a verdict.   The case either contained or did not  contain expert evidence. (N = 100) What is the IV? What is the DV?

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

View Full Document
Frequency First, Kristin can calculate the  frequency : the  number of times a category occurs Results (N = 100) Not Guilty: 62 people Guilty: 38 people The frequency of “not guilty” verdicts was 62
Percentages Frequencies can also be expressed in terms of  percentages To calculate percentages, divide the number of times the  category occurred by the total number of participants Results (N = 100) Not Guilty: 62 people Guilty: 38 people 62/100 = 62% of the participants gave a “not guilty”  verdict 38/100 = 38% of the participants gave a “guilty” verdict

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

View Full Document
Relative Frequency Then, she can calculate the  relative frequency
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 38

Chp 14 Descriptive Statistics Part 1 (student)-1 -...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online