STATS:DATA+MODELS-W/DVD
4th Edition
ISBN: 9780321986498
Author: DeVeaux
Publisher: PEARSON
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Chapter 24, Problem 23E
a.
To determine
Find the appropriate test for the data of childbirth.
b.
To determine
State the null and alternative hypothesis for the data.
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To evaluate the success of a 1-year experimental program designed to increase the mathematical achievement of underprivileged high school seniors, a random sample of participants in the program will be selected and their mathematics scores will be compared with the previous year’s statewide average of 525 for underprivileged seniors. The researchers want to determine whether the experimental program has increased the mean achievement level over the previous year’s statewide average. If alpha=.05, what sample size is needed to have a probability of Type II error of at most .025 if the actual mean is increased to 550? From previous results, sigma=80.
Chapter 24 Solutions
STATS:DATA+MODELS-W/DVD
Ch. 24.3 - 1. Why do we need the control group?
Ch. 24.3 - Prob. 2JCCh. 24.3 - Prob. 3JCCh. 24.3 - Prob. 4JCCh. 24.3 - Prob. 5JCCh. 24.3 - Prob. 6JCCh. 24.4 - Prob. 7JCCh. 24.4 - Prob. 8JCCh. 24.4 - Prob. 9JCCh. 24 - Prob. 1E
Ch. 24 - 2. Bank cards At a major credit card bank, the...Ch. 24 - 3. Human births, again For the births in Exercise...Ch. 24 - 4. Bank cards, again For the customers in Exercise...Ch. 24 - 5. Customer ages An analyst at a local bank...Ch. 24 - 6. Bank cards, once more A market researcher...Ch. 24 - Prob. 7ECh. 24 - Prob. 8ECh. 24 - Prob. 9ECh. 24 - Prob. 10ECh. 24 - Prob. 11ECh. 24 - 12. Which test, again? For each of the following...Ch. 24 - 13. Dice After getting trounced by your little...Ch. 24 - 14. M&M’s As noted in an earlier chapter, Mars...Ch. 24 - Prob. 15ECh. 24 - 16. Mileage A salesman who is on the road visiting...Ch. 24 - 17. NYPD and race Census data for New York City...Ch. 24 - Prob. 18ECh. 24 - 19. Fruit flies Offspring of certain fruit flies...Ch. 24 - 20. Pi Many people know the mathematical constant...Ch. 24 - Prob. 21ECh. 24 - 22. Lottery numbers The fairness of the South...Ch. 24 - Prob. 23ECh. 24 - Prob. 24ECh. 24 - Prob. 25ECh. 24 - Prob. 26ECh. 24 - 27. Childbirth, part 3 In Exercises 23 and 25,...Ch. 24 - 28. Does your doctor know? (part 3) In Exercises...Ch. 24 - Prob. 29ECh. 24 - Prob. 30ECh. 24 - Prob. 31ECh. 24 - Prob. 32ECh. 24 - Prob. 33ECh. 24 - Prob. 34ECh. 24 - Prob. 35ECh. 24 - 36. NYPD again Examine and comment on this table...Ch. 24 - Prob. 37ECh. 24 - 38. Car origins A random survey of autos parked in...Ch. 24 - 39. Montana A poll conducted by the University of...Ch. 24 - Fish diet Medical researchers followed 6272...Ch. 24 - Prob. 41ECh. 24 - 42. Working parents In April 2009, Gallup...Ch. 24 - Prob. 43ECh. 24 - Prob. 44ECh. 24 - Prob. 45ECh. 24 - 46. Full moon, next phase In Exercise 44, you...Ch. 24 - Prob. 47ECh. 24 - Prob. 48ECh. 24 - Prob. 49ECh. 24 - Prob. 50ECh. 24 - Prob. 51ECh. 24 - Prob. 52E
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