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Watching Fireworks A survey found that 21 % of Americans
Chapter 5, Problem 23E(choose chapter or problem)
Problem 23E
Watching Fireworks A survey found that 21 % of Americans watch fireworks on television on July 4. Find the mean, variance, and standard deviation of the number of individuals who watch fireworks on television on July 4 if a random sample of 1000 Americans is selected.
Source: USA Snapshot, USA TODAY.
Questions & Answers
QUESTION:
Problem 23E
Watching Fireworks A survey found that 21 % of Americans watch fireworks on television on July 4. Find the mean, variance, and standard deviation of the number of individuals who watch fireworks on television on July 4 if a random sample of 1000 Americans is selected.
Source: USA Snapshot, USA TODAY.
ANSWER:
Solution :
Step 1 of 1:
Let n denotes the total American selected is 1000.
Let p denotes the 21 percent (0.21) of Americans watch fireworks on television.
We need to find q value.
q = 1-p
q = 1-0.21
q = 0.79
Hence, q=0.79.
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