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# Watching Fireworks A survey found that 21% of Americans watch fireworks on television on

ISBN: 9780073534978 253

## Solution for problem 19 Chapter 5-3

Elementary Statistics: A Step by Step Approach | 7th Edition

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Problem 19

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.

Step-by-Step Solution:
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Chapter 5: Short Term Working Memory Working Memory I. Short term memory can usually hold about 7 +/- 2 items A. Broken into chunks of information (ex: phone numbers are 7 digits and chunked) 1. Recoding: reduces the number of units held in STM by increasing the richness of each unit B. Cowan said 4 +/- 1...

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