How Teenagers Listen to Music. For its Music 360 survey, Nielsen Co. asked teen agers and adults how each group has listened to music in the past 12 months. Nearly twothirds of U.S. teenagers under the age of 18 say they use Google Inc.’s video sharing site to listen to music and 35% of the teenagers said they use Pandora Media Inc.’s custom online radio service (The Wall Street Journal). Suppose 10 teenagers are selected randomly to be interviewed about how they listen to music. a. Is randomly selecting 10 teenagers and asking whether or not they use Pandora Media Inc.’s online service a binomial experiment? b. What is the probability that none of the 10 teenagers uses Pandora Media Inc.’s online radio service? c. What is the probability that 4 of the 10 teenagers use Pandora Media Inc.’s online radio service? d. What is the probability that at least 2 of the 10 teenagers use Pandora Media Inc.’s online radio service?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
34. How Teenagers Listen to Music. For its Music 360 survey, Nielsen Co. asked teen agers and adults how each group has listened to music in the past 12 months. Nearly twothirds of U.S. teenagers under the age of 18 say they use Google Inc.’s video sharing site to listen to music and 35% of the teenagers said they use Pandora Media Inc.’s custom online radio service (The Wall Street Journal). Suppose 10 teenagers are selected randomly to be interviewed about how they listen to music.
a. Is randomly selecting 10 teenagers and asking whether or not they use Pandora Media Inc.’s online service a binomial experiment?
b. What is the probability that none of the 10 teenagers uses Pandora Media Inc.’s online radio service?
c. What is the probability that 4 of the 10 teenagers use Pandora Media Inc.’s online radio service?
d. What is the probability that at least 2 of the 10 teenagers use Pandora Media Inc.’s online radio service?
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