Elementary Statistics (12th Edition)

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

Chapter 1 - Introduction to Statistics - Review - Review Exercises: 7

Answer

The procedure is statistically significant but is not practically significant.

Work Step by Step

The probability that these same results would occur if the method was ineffective is very low, therefore the procedure is statistically significant. On the other hand, because 112 girls out of 200 is still pretty close to 100 girls, which is the expected number of girls given that the method was not used, the procedure is not practically significant.
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