Intro Stats, Books a la carte Plus NEW MyLab Statistics with Pearson eText -- Access Card Package (5th Edition)
5th Edition
ISBN: 9780134210247
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Textbook Question
Chapter 16, Problem 10E
Significant again? A new reading program may reduce the number of elementary school students who read below grade level. The company that developed this program supplied materials and teacher training for a large-scale test involving nearly 8500 children in several different school districts. Statistical analysis of the results showed that the percentage of students who did not meet the grade-level goal was reduced from 15.9% to 15.1%. The hypothesis that the new reading program produced no improvement was rejected with a P-value of 0.023.
- a) Explain what the P-value means in this context.
- b) Even though this reading method has been shown to be significantly better, why might you not recommend that your local school adopt it?
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Significant again? A new reading program may reducethe number of elementary school students who readbelow grade level. The company that developed thisprogram supplied materials and teacher training for alarge-scale test involving nearly 8500 children in severaldifferent school districts. Statistical analysis of the resultsshowed that the percentage of students who did not meetthe grade-level goal was reduced from 15.9% to 15.1%.The hypothesis that the new reading program producedno improvement was rejected with a P-value of 0.023.a) Explain what the P-value means in this context.b) Even though this reading method has been shown tobe significantly better, why might you not recommendthat your local school adopt it?
A new reading program may reduce the number of elementary
school students who read below grade level. The company that
developed this program supplied materials and teacher training
for a large-scale test involving nearly 8,400 children in several
different school districts. Statistical analysis of the results
showed that the percentage of students who did not meet the
grade-level goal was reduced from 14.7% to 14%. The
hypothesis that the new reading program produced no
improvement was rejected with a P-value of 0.026. Complete
parts a) and b) below.
a) Explain what the P-value means in this context. Choose the
correct answer below.
OA. There is a 97.4% chance of seeing a sample proportion
of 14.7% (or more) of students failing the test by natural
sampling variation if 14% is the true population value.
B. There is only a 2.6% chance of seeing a sample
proportion of 14.7% (or more) of students failing the test
by natural sampling variation if 14% is the true
population value.
OC. There…
The mean score on a standardized math skills test is known to be 50 for the entire U.S. population of fourth graders (with higher scores indicating better performance on the exam). A new math skills training program was being used at a local school district, and an administrator was charged with the task of evaluating whether the children under the new program have. performance that is different from the national average. Twenty-five fourth graders who were instructed using the math skills program were administered the standardized math exam (named variable as mathscore)
State the null and alternative hypothesis
Chapter 16 Solutions
Intro Stats, Books a la carte Plus NEW MyLab Statistics with Pearson eText -- Access Card Package (5th Edition)
Ch. 16.2 - An experiment to test the fairness of a roulette...Ch. 16.2 - Prob. 2JCCh. 16.2 - Prob. 3JCCh. 16.3 - Prob. 4JCCh. 16.3 - Prob. 5JCCh. 16.3 - Prob. 6JCCh. 16.3 - Prob. 7JCCh. 16.4 - Remember the bank thats sending out DVDs to try to...Ch. 16.4 - Prob. 9JCCh. 16.4 - For the bank, which situation has higher power: a...
Ch. 16 - True or false Which of the following are true? If...Ch. 16 - False or true Which of the following are true? If...Ch. 16 - P-values Which of the following are true? If...Ch. 16 - Prob. 4ECh. 16 - Prob. 5ECh. 16 - Prob. 6ECh. 16 - Prob. 7ECh. 16 - More critical values For each of the following...Ch. 16 - Prob. 9ECh. 16 - Significant again? A new reading program may...Ch. 16 - SECTION 16.4 11. Errors For each of the following...Ch. 16 - More errors For each of the following situations,...Ch. 16 - CHAPTER EXERCISES 13. P-value A medical researcher...Ch. 16 - Prob. 14ECh. 16 - Alpha A researcher developing scanners to search...Ch. 16 - Prob. 16ECh. 16 - Prob. 17ECh. 16 - Is the Euro fair? Soon after the Euro was...Ch. 16 - Prob. 19ECh. 16 - Prob. 20ECh. 16 - Prob. 21ECh. 16 - Prob. 22ECh. 16 - Prob. 23ECh. 16 - Prob. 24ECh. 16 - Prob. 25ECh. 16 - Prob. 26ECh. 16 - Prob. 27ECh. 16 - Alzheimers Testing for Alzheimers disease can be a...Ch. 16 - Prob. 29ECh. 16 - Quality control Production managers on an assembly...Ch. 16 - Cars, again As in Exercise 29, state regulators...Ch. 16 - Prob. 32ECh. 16 - Equal opportunity? A company is sued for job...Ch. 16 - Stop signs Highway safety engineers test new road...Ch. 16 - Prob. 35ECh. 16 - Ads A company is willing to renew its advertising...Ch. 16 - Prob. 37ECh. 16 - Prob. 38ECh. 16 - Prob. 39ECh. 16 - Catheters During an angiogram, heart problems can...Ch. 16 - Prob. 41ECh. 16 - Prob. 42ECh. 16 - Prob. 43ECh. 16 - Faulty or not? You are in charge of shipping...Ch. 16 - Prob. 45ECh. 16 - Prob. 46ECh. 16 - Prob. 47ECh. 16 - Prob. 48E
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