Sleuth_01

Sleuth_01 - Chapter 1 Drawing Statistical Conclusions...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Chapter 1 Drawing Statistical Conclusions Statistical Sleuthing Carefully examining data to answer questions of interest (Ramsey and S ! afer) Estimating the unobservable things of science What is an example of an unobservable thing of science? Answer: the proportion of all adults in the US who favor gay marriage. Statistical Sleuth Data " e data on the disk in the ba # of the book is available on Bla # board as either text or Excel $ les. Case Studies Ea ! ! apter of our text begins with two case studies. " ese are published studies of real data. Take 2 % minutes and read the $ rst case study. What is the study about? Case Study 1: Motivation and Creativity Random assignment of 47 students to one of two groups (intrinsic or extrinsic). Creativity score: Students Haiku poems were rated by experts: Intrinsic group: rating ranged from 12 to 29.7, with an average of 19.88. Extrinsic group: rating ranged from 5 to 24, with an average of 15.74. Blinding: students didnt know their thought pa & erns were being in ' uenced (nor did raters) Case Study 1 (cont.) Is there evidence that creativity scores are a ( ected by type of motivation induced by questionnaires. Randomization " is study did take a set of students and randomize them so that whi ! group ea ! student was in was randomly selected. " erefore, we may conclude that the di ( erences in the creativity scores is a result of whi ! questionnaire was given to the students However, the students were NOT randomly selected from a larger population. So we cannot automatically assume that the result of this experiment will generalize to the population as a whole. Case Study 2: Sex Discrimination Salaries noted for all 32 male and 61 female entry- level clerks hired by the Harris Trust and Savings Bank between 1969 and 1977. Called an observational study because the groups were not created in the study. Salaries were quite variable: Male salaries ranged from $4620 to $8100, with an average of $5957 Female salaries ranged from $3900 to $6300, with an average of $5137 Case Study 2 (cont.) Is there evidence that males, as a group, received higher starting salaries than females at Harris Bank?...
View Full Document

Page1 / 42

Sleuth_01 - Chapter 1 Drawing Statistical Conclusions...

This preview shows document pages 1 - 10. Sign up to view the full document.

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