Asked by ASH
The length of Super Bowl commercials is said to be Normally distributed with a mean of 36 seconds and standard deviation of 8 seconds.
a. Find the probability that a randomly selected Super Bowl commercial is shorter than 45 seconds? (2 points)
b. Find the probability that a randomly selected Super Bowl commercial is between 30 and 50 seconds long? (3 points)
c. Budweiser commercials always seem to fall into the longest 4% of Super Bowl commercials. That means that Budweiser commercials are at least how long? (3 points)
a. Find the probability that a randomly selected Super Bowl commercial is shorter than 45 seconds? (2 points)
b. Find the probability that a randomly selected Super Bowl commercial is between 30 and 50 seconds long? (3 points)
c. Budweiser commercials always seem to fall into the longest 4% of Super Bowl commercials. That means that Budweiser commercials are at least how long? (3 points)
Answers
Answered by
Reiny
David Lane's webpage is perfect for this type of question and replaces the charts and tables found in the back of textbooks
http://davidmlane.com/hyperstat/z_table.html
Just fill in the data
for c) remember that 96% would be shorter.
You might want to use the second feature of this calculator.
http://davidmlane.com/hyperstat/z_table.html
Just fill in the data
for c) remember that 96% would be shorter.
You might want to use the second feature of this calculator.
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