Bundle: Introduction to Statistics and Data Analysis, 5th + WebAssign Printed Access Card: Peck/Olsen/Devore. 5th Edition, Single-Term
5th Edition
ISBN: 9781305620711
Author: Roxy Peck, Chris Olsen, Jay L. Devore
Publisher: Cengage Learning
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Chapter 16.2, Problem 9E
Peak force (N) on the hand was measured just prior to impact and just after impact on a backhand drive for six advanced tennis players. The resulting data, from the paper “Forces on the Hand in the Tennis One-Handed Backhand” (International Journal of Sport Biomechanics [1991]: 282–292), are given in the accompanying table.
Use the signed-rank test to determine if the
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Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). Using the hypothetical data provided below, run your analyses in R to test whether the mean pressure applied to the driver’s head during a crash test is equal for each types of car (higher pressure = less safe).
Compact Car
Midsize Car
Full-Size Car
643
469
484
655
427
456
702
525
402
What kind of statistical analysis do you need to use and why?
State the null and alternative hypotheses.
Check your assumptions. Include screenshots of your R output and explain why each of them are or are not met.
Using R, run your analysis and include a screenshot.
Using R, run post-hoc tests and include a screenshot.
What do you conclude about the null hypothesis?
What does each of your p-values tell you? Are there differences and in which comparisons?…
Ankle Brachial Index. The ankle brachial index (ABI) compares the blood pressure of a patient’s arm to the blood pressure of the patient’s leg. The ABI can be an indicator of different diseases, including arterial diseases. A healthy (or normal) ABI is 0.9 or greater. In a study by M. McDermott et al. titled “Sex Differences in Peripheral Arterial Disease: Leg Symptoms and Physical Functioning” (Journal of the American Geriatrics Society, Vol. 51, No. 2, pp. 222–228), the researchers obtained the ABI of 187 women with peripheral arterial disease. The results were a mean ABI of 0.64 with a standard deviation of 0.15. At the 1% significance level, do the data provide sufficient evidence to conclude that, on average, women with peripheral arterial disease have an unhealthy ABI?
Do wearable devices that monitor diet and physical activity
help people lose weight? Researchers had 237 subjects who
were already involved in a program of diet and exercise use
wearable technology for 24 months. They measured their
weight (in kilograms) before using the technology and 24
months after using the technology.
The 237 differences in weight (weight after 24 months
minus weight before using the wearable technology) had
x = -3.5 and s = 7.8.
Let u be the mean weight difference.
41
John M. Jakicic et al., "Effect of wearable technology combined with a
lifestyle intervention on long-term weight loss, the IDEA randomized
clinical trial," JAMA, 316, 2016, pp. 1161-1171.
O Macmillan Learning
"
What is the test statistic? Give your answer to three
decimal places.
What is the P-value?
The P-value is between 0.01 and 0.05.
The P-value is less than 0.0005.
O The P-value is between 0.0005 and 0.01.
The P-value is greater than 0.05.
Chapter 16 Solutions
Bundle: Introduction to Statistics and Data Analysis, 5th + WebAssign Printed Access Card: Peck/Olsen/Devore. 5th Edition, Single-Term
Ch. 16.1 - Urinary fluoride concentration (in parts per...Ch. 16.1 - Prob. 2ECh. 16.1 - Prob. 3ECh. 16.1 - A blood lead level of 70 mg/ml has been commonly...Ch. 16.1 - The effectiveness of antidepressants in treating...Ch. 16.1 - Prob. 6ECh. 16.1 - Prob. 7ECh. 16.2 - The effect of a restricted diet in the treatment...Ch. 16.2 - Peak force (N) on the hand was measured just prior...Ch. 16.2 - In an experiment to study the way in which...
Ch. 16.2 - Prob. 11ECh. 16.2 - Prob. 12ECh. 16.2 - Prob. 13ECh. 16.2 - Prob. 14ECh. 16.2 - Prob. 15ECh. 16.2 - Prob. 16ECh. 16.2 - Prob. 17ECh. 16.2 - The signed-rank test can be adapted for use in...Ch. 16.3 - Prob. 19ECh. 16.3 - Prob. 20ECh. 16.3 - The given data on phosphorus concentration in...Ch. 16.3 - Prob. 22ECh. 16.3 - Prob. 23ECh. 16.3 - The following data on amount of food consumed (g)...Ch. 16.3 - The article Effect of Storage Temperature on the...
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