Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 6 - Normal Probability Distributions - 6-7 Normal as Approximation to Binomial - Basic Skills and Concepts - Page 311: 6

Answer

Normal approximation should not be used.

Work Step by Step

q=1-p=1-0.7=0.3 $n\cdot p=12\cdot 0.7=8.4\geq5.$ $n\cdot q=12\cdot 0.3=3.6<5.$ Hence, the requirements are not satisfied, therefore normal approximation should not be used.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.