Statistics for Engineers and Scientists
4th Edition
ISBN: 9780073530789
Author: Navidi
Publisher: MCG
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Textbook Question
Chapter 1.3, Problem 14E
Following are boxplots comparing the amount of econozole nitrate (in µg/cm2) absorbed into skin for a brand name and a generic antifungal ointment (from the article "Improved Bioequivalence Assessment of Topical Dermatological Drug Products Using Dermatopharmacokinetics.” B. N’Dri-Stempfer, W. Navidi, R. Guy, and A. Bunge, Pharmaceutical Research, 2009:316–328).
True or false:
- a. The median amount absorbed for the brand name drug is greater than the 25th percentile of the amount absorbed for the generic drug.
- b. The median amount absorbed for the brand name drug is greater than the median amount absorbed for the generic drug.
- c. About half the sample values for the brand name drug are between 2 and 3.
- d. There is a greater proportion of values outside the box for the brand name drug than for the generic drug.
- e. Both samples are skewed to the right.
- f. Both samples contain outliers.
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(a)
Calculate the values of the mean and the median for blood lead level for the sample of African Americans.
mean
median
(b)
Which of the mean or the median is larger? What characteristic of the data set explains the relative values of the mean and the median?
The median is greater than the mean. This is explained by the fact that the distribution is positively skewed.
The mean is greater than the median. This is explained by the fact that the distribution is positively skewed.
The median is greater than the mean. This is explained by the fact that the…
Chapter 1 Solutions
Statistics for Engineers and Scientists
Ch. 1.1 - Each of the following processes involves sampling...Ch. 1.1 - If you wanted to estimate the mean height of all...Ch. 1.1 - True or false: a. A simple random sample is...Ch. 1.1 - A sample of 100 college students is selected from...Ch. 1.1 - A certain process for manufacturing integrated...Ch. 1.1 - Refer to Exercise 5. True or false: a. If the...Ch. 1.1 - To determine whether a sample should be treated as...Ch. 1.1 - A medical researcher wants to determine whether...Ch. 1.1 - A medical researcher wants to determine whether...Ch. 1.2 - True or false: For any list of numbers, half of...
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