Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Chapter 10.3, Problem 96E
Working with Large Data Sets
10.96 Treating Psychotic Illness. L. Petersen et al. evaluated the effects of
- a. Obtain normal
probability plots, boxplots, and the standard deviations for the two samples. - b. Based on your results from part (a), which would you be inclined to use to compare the population means: a pooled or a nonpooled t-procedure? Explain your answer.
- c. Do the data provide sufficient evidence to conclude that, on average, clients preferred the integrated treatment? Perform the required hypothesis test at the 1% significance level by using both the pooled t-test and the nonpooled t-test. Compare your results.
- d. Find a 98% confidence interval for the difference between mean client satisfaction scores for the two treatments. Obtain the required confidence interval by using both the pooled t-interval procedure and the nonpooled t-interval procedure. Compare your results.
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Mental Health
A study was performed looking at the effect of physical activity on cognitive function among adults at high risk for Alzheimer's disease. There were 170 eligible subjects randomly assigned to either an exercise intervention (exercise group) or a control intervention (control group). The subjects were followed at 6-month intervals up to
18 months of follow-up. The primary assessment scale was the Alzheimer's Disease Assessment Scale-Cognitive Subscale (ADAS-Cog). The results at 18 months of follow-up among participants with mild cognitive impairment are given in the table below. (Let population 1 be the exercise group and population 2 be the control group.
Use exercise group control group.)
Mean difference from baseline (18-month score
minus baseline score) among participants with
mild cognitive impairment in the ADAS-Cog
score*
Mean change
95% CI
n
H₁:
Exercise group Control group
USE SALT
-0.37
(-1.37, 0.63)
48
-0.43
(-1.35, 0.49)
52
(a) What is the standard deviation of…
Treating Psychotic Illness. L. Petersen et al. evaluated the effects of integrated treatment for patients with a first episode of psychotic illness in the paper “A Randomised Multicentre Trial of Integrated Versus Standard Treatment for Patients with a First Episode of Psychotic Illness” (British Medical Journal, Vol. 331, (7517):602). Part of the study included a questionnaire that was designed to measure client satisfaction for both the integrated treatment and a standard treatment. The data on the WeissStats site are based on the results of the client questionnaire.
a. use the technology of your choice to obtain boxplots for the data sets, using the same scale.
b. compare the data sets by using your results from part (a), paying special attention to center and variation.
a pathological video game user(PVGU) is à video game user averages 31 or more hours a week of of gameplay.
Chapter 10 Solutions
Introductory Statistics (10th Edition)
Ch. 10.1 - Understanding the Concepts and Skills 10.1 Give an...Ch. 10.1 - Define the phrase independent samples.Ch. 10.1 - consider the quantities 1, 1, x1, s1 2, 2, x2and,...Ch. 10.1 - Discuss the basic strategy for performing a...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...Ch. 10.1 - Prob. 8ECh. 10.1 - In each of Exercises 10.5-10.10, we have stated...Ch. 10.1 - In each of Exercises 10.510.10, we have stated the...
Ch. 10.1 - Prob. 11ECh. 10.1 - Identify the assumption for using the two-means...Ch. 10.1 - In each of Exercises 10.1310.18, we have presented...Ch. 10.1 - In each of Exercises 10.1310.18, we have presented...Ch. 10.1 - In each of Exercises 10.1310.18, we have presented...Ch. 10.1 - Prob. 16ECh. 10.1 - In each of Exercises 10.1310.18, we have presented...Ch. 10.1 - Prob. 18ECh. 10.1 - A variable of two populations has a mean of 40 and...Ch. 10.1 - Prob. 20ECh. 10.1 - Prob. 21ECh. 10.1 - Prob. 22ECh. 10.1 - Prob. 23ECh. 10.1 - Prob. 24ECh. 10.1 - In Exercises 10.2510.30, hypothesis tests are...Ch. 10.1 - Prob. 26ECh. 10.1 - Prob. 27ECh. 10.1 - In Exercises 10.2510.30, hypothesis tests are...Ch. 10.1 - Prob. 29ECh. 10.1 - In Exercises 10.2510.30, hypothesis tests are...Ch. 10.2 - Regarding the four conditions required for using...Ch. 10.2 - Explain why sp is called the pooled sample...Ch. 10.2 - Prob. 35ECh. 10.2 - Prob. 36ECh. 10.2 - Prob. 37ECh. 10.2 - In each of Exercises 10.3510.38, we have provided...Ch. 10.2 - Prob. 39ECh. 10.2 - In each of Exercises 10.3910.44, we have provided...Ch. 10.2 - Prob. 41ECh. 10.2 - Prob. 42ECh. 10.2 - Prob. 43ECh. 10.2 - Prob. 44ECh. 10.2 - Applying the Concepts and Skills Preliminary data...Ch. 10.2 - Prob. 46ECh. 10.2 - Fortified Juice and PTH. V. Tangpricha et al. did...Ch. 10.2 - Prob. 48ECh. 10.2 - Nigerian Spleen Length. O. Ehimwenma and M. Tagbo,...Ch. 10.2 - Recess and Wasted Food. E. Bergman et al....Ch. 10.2 - In Exercises 10.5110.56, apply Procedure 10.2 on...Ch. 10.2 - In Exercises 10.5110.56, apply Procedure 10.2 on...Ch. 10.2 - Prob. 53ECh. 10.2 - Prob. 54ECh. 10.2 - In Exercises 10.5110.56, apply Procedure 10.2 on...Ch. 10.2 - Prob. 56ECh. 10.2 - Prob. 57ECh. 10.2 - Children of Diabetic Mothers. The paper...Ch. 10.2 - A Better Golf Tee? An independent golf equipment...Ch. 10.2 - Extending the Concepts and Skills 10.60 In this...Ch. 10.2 - Prob. 61ECh. 10.2 - Prob. 63ECh. 10.2 - Prob. 64ECh. 10.2 - Prob. 65ECh. 10.3 - In each of Exercises 10.6710.70, suppose that you...Ch. 10.3 - In each of Exercises 10.6710.70, suppose that you...Ch. 10.3 - Prob. 69ECh. 10.3 - In each of Exercises 10.6710.70, suppose that you...Ch. 10.3 - Each pair of graphs in Fig. 10.8 shows the...Ch. 10.3 - Prob. 72ECh. 10.3 - In each of Exercises 10.7310.78, we have provided...Ch. 10.3 - In each of Exercises 10.7310.78, we have provided...Ch. 10.3 - In each of Exercises 10.7310.78, we have provided...Ch. 10.3 - In each of Exercises 10.7310.78, we have provided...Ch. 10.3 - Prob. 77ECh. 10.3 - In each of Exercises 10.7310.78, we have provided...Ch. 10.3 - Political Prisoners. According to the American...Ch. 10.3 - Phyllodes Tumors. Phyllodes tumors of the breast...Ch. 10.3 - Acute Postoperative Days. Refer to Example 10.6...Ch. 10.3 - Stressed-Out Bus Drivers. An intervention program...Ch. 10.3 - Schizophrenia and Dopamine. Previous research has...Ch. 10.3 - Wing Length. D. Cristol et al. published results...Ch. 10.3 - In Exercises 10.8510.90, apply Procedure 10.4 on...Ch. 10.3 - Prob. 86ECh. 10.3 - Prob. 87ECh. 10.3 - Prob. 88ECh. 10.3 - Prob. 89ECh. 10.3 - In Exercise 10.8510.90, apply Procedure 10.4 on...Ch. 10.3 - Prob. 91ECh. 10.3 - Prob. 92ECh. 10.3 - Prob. 93ECh. 10.3 - Prob. 94ECh. 10.3 - Neurosurgery Operative Times. In Example 10.6 on...Ch. 10.3 - Working with Large Data Sets 10.96 Treating...Ch. 10.3 - A Better Golf Tee? An independent golf equipment...Ch. 10.3 - Prob. 98ECh. 10.3 - Prob. 99ECh. 10.3 - Tukey's Quick Tost. In this exercise, we examine...Ch. 10.3 - Prob. 101ECh. 10.3 - Left-Tailed Hypothesis Tests and CIs. If the...Ch. 10.3 - Prob. 103ECh. 10.4 - Prob. 104ECh. 10.4 - Prob. 105ECh. 10.4 - Prob. 106ECh. 10.4 - Prob. 107ECh. 10.4 - Prob. 108ECh. 10.4 - Prob. 109ECh. 10.4 - Prob. 110ECh. 10.4 - Prob. 111ECh. 10.4 - Prob. 112ECh. 10.4 - Prob. 113ECh. 10.4 - Prob. 114ECh. 10.4 - Prob. 115ECh. 10.4 - Prob. 116ECh. 10.4 - Prob. 117ECh. 10.4 - Prob. 118ECh. 10.4 - Prob. 119ECh. 10.4 - Prob. 120ECh. 10.4 - Prob. 121ECh. 10.4 - Prob. 122ECh. 10.4 - Prob. 123ECh. 10.4 - Mandate Perceptions. L. Grossback et al. examined...Ch. 10.4 - Prob. 125ECh. 10.4 - Prob. 126ECh. 10.4 - Prob. 127ECh. 10.4 - SAT Essay Scores. The SAT is a standardized test...Ch. 10.4 - Prob. 129ECh. 10.4 - Prob. 130ECh. 10.4 - Prob. 131ECh. 10.4 - Working with Large Data Sets 10.132 Gender and...Ch. 10.4 - Prob. 133ECh. 10.4 - Teacher Salaries. The National Education...Ch. 10.4 - Prob. 135ECh. 10.4 - Prob. 136ECh. 10.4 - Prob. 138ECh. 10.5 - Slate one possible advantage of using paired...Ch. 10.5 - Prob. 140ECh. 10.5 - Prob. 141ECh. 10.5 - Prob. 142ECh. 10.5 - In Exercises 10.143-10.148, hypothesis tests...Ch. 10.5 - In Exercises 10.143-10.148, hypothesis tests...Ch. 10.5 - In Exercises 10.143-10.148, hypothesis tests...Ch. 10.5 - Prob. 146ECh. 10.5 - Prob. 147ECh. 10.5 - Prob. 148ECh. 10.5 - Prob. 149ECh. 10.5 - Prob. 150ECh. 10.5 - Prob. 151ECh. 10.5 - Prob. 152ECh. 10.5 - Prob. 153ECh. 10.5 - Prob. 154ECh. 10.5 - Applying the Concepts and Skills Preliminary data...Ch. 10.5 - Prob. 156ECh. 10.5 - Prob. 157ECh. 10.5 - Measuring Treadwear. R. Stichler et al. compared...Ch. 10.5 - Glaucoma and Corneal Thickness. Glaucoma is a...Ch. 10.5 - Cooling Down. 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This exercise shows what can...Ch. 10.6 - Understanding the Concepts and Skills 10.177...Ch. 10.6 - A hypothesis test based on a simple random paired...Ch. 10.6 - Suppose that you want to perform a hypothesis test...Ch. 10.6 - Suppose that you want to perform a hypothesis test...Ch. 10.6 - Prob. 181ECh. 10.6 - Prob. 182ECh. 10.6 - Prob. 183ECh. 10.6 - Prob. 184ECh. 10.6 - Prob. 185ECh. 10.6 - Prob. 186ECh. 10.6 - Prob. 187ECh. 10.6 - Prob. 188ECh. 10.6 - Prob. 189ECh. 10.6 - Prob. 190ECh. 10.6 - Glaucoma and Corneal Thickness. Glaucoma is a...Ch. 10.6 - Cooling Down. Cooling down with a cold drink...Ch. 10.6 - Prob. 193ECh. 10.6 - Tobacco Mosaic Virus. 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Drink and Be...Ch. 10 - Prob. 17RPCh. 10 - Insulin and BMD. I. Erturul et al. conducted a...Ch. 10 - Prob. 19RPCh. 10 - Prob. 20RPCh. 10 - UWEC UNDERGRADUATES Recall from Chapter 1 (see...Ch. 10 - DEXAMETHASONE THERAPY AND IQ On page 439, we...
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