Page1 / 4

400Hw03 - STAT 400 Spring 2011 Homework #3 (10 points) (due...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon

400Hw03 - STAT 400 Spring 2011 Homework #3 (10 points) (due...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
STAT 400 Spring 2011 Homework #3 (10 points) (due Friday, February 11, by 3:00 p.m.) No credit will be given without supporting work. 1. During two-and-a-half years of research, bio-psychologist Onur Güntürkün discovered that when people kiss, they turn their heads to the right roughly twice as often as to the left. (Güntürkün, O. Human behaviour: Adult persistence of head-turning asymmetry. Nature , 421, 711 , (2003).) Suppose the probability that a person would turn his/her head to the right is 2 / 3 , and the probability that a person would turn his/her head to the left is 1 / 3 . A couple is planning a kiss on Valentine’s day. Assume that their choice of which way to turn their heads is independent of each other. a) What is the probability that they would both turn their heads to the right (and kiss)? b) What is the probability that they would bump noses (i.e., choose the opposite direction to turn their heads)? Similar arguments with 3 / 4 and 1 / 4 predict phenotypic ratios of 9:3:3:1 in F 2 offspring in Mendel's dihybrid crosses. 2. From a group of 16 male and 9 female armadillos, Noah must choose two to travel on his ark. Unable to distinguish between male and female armadillos, Noah must choose at random. a)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online