Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 10.4, Problem 10.25E
Healthy Teeth Jan Lindhe conducted a studyon the effect of an oral antiplaque rinse on plaquebuildup on teeth.6Fourteen people whose teeth werethoroughly cleaned and polished were randomlyassigned to two groups of seven subjects each. Bothgroups were assigned to use oral rinses (no brushing)for a 2-week period. Group 1 used a rinse thatcontained an antiplaque agent. Group 2, the controlgroup, received a similar rinse except that, unknown to the subjects, the rinse contained no antiplaque agent. Aplaque index x, a measure of plaque buildup, wasrecorded at 14 days with means and standard deviations for the two groups shown in the table.
- State the null and alternative hypotheses that shouldbe used to test the effectiveness of the antiplaqueoral rinse.
- Do the data provide sufficient evidence to indicatethat the oral antiplaque rinse is effective? Test using
- Find the approximate p-value for the test.
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Chapter 10 Solutions
Introduction to Probability and Statistics
Ch. 10.3 - Prob. 10.1ECh. 10.3 - Prob. 10.2ECh. 10.3 - Prob. 10.3ECh. 10.3 - Prob. 10.4ECh. 10.3 - Prob. 10.5ECh. 10.3 - Prob. 10.6ECh. 10.3 - Dissolved O2 Content Industrial wastes andsewage...Ch. 10.3 - Prob. 10.8ECh. 10.3 - Prob. 10.10ECh. 10.3 - Prob. 10.11E
Ch. 10.3 - Prob. 10.12ECh. 10.3 - Prob. 10.13ECh. 10.3 - Cholesterol, continued Refer to Exercise 10.16....Ch. 10.4 - Give the number of degrees of freedom for s2, the...Ch. 10.4 - Prob. 10.19ECh. 10.4 - Prob. 10.20ECh. 10.4 - Prob. 10.21ECh. 10.4 - Prob. 10.22ECh. 10.4 - The MINITAB printout shows a test for the...Ch. 10.4 - Prob. 10.24ECh. 10.4 - Healthy Teeth Jan Lindhe conducted a studyon the...Ch. 10.4 - Prob. 10.26ECh. 10.4 - Prob. 10.27ECh. 10.4 - Disinfectants An experiment published in...Ch. 10.4 - Prob. 10.29ECh. 10.4 - Prob. 10.31ECh. 10.4 - Prob. 10.32ECh. 10.4 - Freestyle Swimmers, continued Refer toExercise...Ch. 10.4 - Prob. 10.34ECh. 10.4 - Prob. 10.35ECh. 10.5 - Prob. 10.36ECh. 10.5 - Prob. 10.37ECh. 10.5 - Prob. 10.38ECh. 10.5 - Prob. 10.39ECh. 10.5 - Runners and Cyclists II Refer to Exercise 10.27....Ch. 10.5 - Prob. 10.41ECh. 10.5 - No Left Turn An experiment was conducted to...Ch. 10.5 - Healthy Teeth II Exercise 10.25 describes adental...Ch. 10.5 - Prob. 10.44ECh. 10.5 - Prob. 10.45ECh. 10.5 - Prob. 10.46ECh. 10.5 - Prob. 10.47ECh. 10.6 - Prob. 10.49ECh. 10.6 - Prob. 10.50ECh. 10.6 - A random sample of size n=7 from a...Ch. 10.6 - Prob. 10.54ECh. 10.6 - Prob. 10.56ECh. 10.7 - Prob. 10.58ECh. 10.7 - Prob. 10.59ECh. 10.7 - Prob. 10.60ECh. 10.7 - Prob. 10.63ECh. 10.7 - Prob. 10.64ECh. 10.7 - Prob. 10.65ECh. 10.7 - Prob. 10.66ECh. 10 - Prob. 10.67SECh. 10 - Prob. 10.68SECh. 10 - Prob. 10.69SECh. 10 - Prob. 10.70SECh. 10 - Prob. 10.71SECh. 10 - Prob. 10.72SECh. 10 - Prob. 10.73SECh. 10 - Prob. 10.74SECh. 10 - Prob. 10.76SECh. 10 - Prob. 10.78SECh. 10 - Prob. 10.79SECh. 10 - Prob. 10.80SECh. 10 - Prob. 10.81SECh. 10 - Prob. 10.82SECh. 10 - Prob. 10.83SECh. 10 - Prob. 10.84SECh. 10 - Prob. 10.85SECh. 10 - Prob. 10.86SECh. 10 - Prob. 10.88SECh. 10 - Prob. 10.89SECh. 10 - Prob. 10.90SECh. 10 - Dieting Eight obese persons were placed on a diet...Ch. 10 - Prob. 10.93SECh. 10 - Reaction Times II Refer to Exercise10.94. Suppose...Ch. 10 - Prob. 10.96SECh. 10 - Prob. 10.97SECh. 10 - Prob. 10.98SECh. 10 - Prob. 10.99SECh. 10 - Prob. 10.101SECh. 10 - Prob. 10.105SECh. 10 - Alcohol and Altitude The effect of...Ch. 10 - Prob. 10.107SECh. 10 - Prob. 10.108SECh. 10 - Prob. 10.109SECh. 10 - Prob. 10.110SECh. 10 - Prob. 10.111SECh. 10 - Prob. 10.112SECh. 10 - Prob. 10.114SECh. 10 - Prob. 10.116SECh. 10 - Prob. 10.118SECh. 10 - Prob. 1CSCh. 10 - Prob. 2CSCh. 10 - Prob. 3CS
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