MS 150 Statistics spring 2009 quiz 06: Probability • Name:

20 February 2009

1. __________ What is the probability of rolling a four on an eight sided die numbered from one to eight?
2. __________ What is the probability of rolling an odd number on a nine-sided die numbered one to nine?
3. __________ B is the dominant gene for Brown eyes. b is the recessive gene for blue eyes. BB and Bb are Brown eyed. bb is blue eyed. A homozygous BB Brown eyed female mates with a homozygous recessive bb blue eyed male. What is the probability of a blue eyed child?
4. __________A heterozygous dominant Bb Brown eyed female mates with a homozygous recessive bb blue eyed male. What is the probability of a blue eyed child?

Note that the following data uses some new information from sources cited below, and expands to more broadly include social media sites. With this expansion, Blogger takes the top spot. Blogger is a site run by Google at which people can blog. Data may not be officially comparable as the data is combined from various studies. Some data is extrapolated from monthly data. mTUV is millions of unique visitors, typically users of the service.

5. Fill in the relative frequencies in the table above.
6. __________ What is the probability that a user is a FaceBook user?
7. __________ What is the probability that a user is a Myspace user?
8. ________________ By probability, which site is the most popular?
9. __________ What is the probability that a user is NOT a Bebo user?

What social media sites do you use? If you can, list all you use, including those not on the list above.