Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305445963
Author: PECK
Publisher: Cengage
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Textbook Question
Chapter 3, Problem 71CR
Americium 241 (241Am) is a radioactive material used in the manufacture of smoke detectors. The article “Retention and Dosimetry of Injected 241Am in Beagles” (Radiation Research [1984]: 564–575) described a study in which 55 beagles were injected with a dose of 241 Am (proportional to each animal’s weight). Skeletal retention of 241 Am (in microcuries per kilogram) was recorded for each beagle, resulting in the foil owing data:
- a. Construct a frequency distribution for these data, and draw the corresponding histogram.
- b. Write a short description of the important features of the shape of the histogram.
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Americium 241 (241 Am) is a radioactive material used in the manufacture of
241
smoke detectors. An article described a study in which 55 beagles were injected
with a dose of Am (proportional to each animal's weight). Skeletal retention of
241 Am (in microcuries per kilogram) was recorded for each beagle, resulting in the
following data:
0.196
0.3
0.287
0.315
0.335
0.333
0.306
0.353
0.301
0.441
0.337
0.451
0.346
0.243
0.447
0.332
0.408
0.367
0.357
0.304
0.236
0.419
Answer:
0.498
0.448
0.334
0.585
0.292
0.399
0.345
0.32
0.489
0.354
0.428
0.411
0.188
0.299
0.291
0.375
0.303
0.186
0.349
0.318
0.345
0.361
0.324
0.399
0.292
0.19
0.305
0.419
0.393
0.324
0.468
0.412
0.329
By constructing an equal width GFDT (for the given dataset) with six classes and
class width (using the given formula in Lecture note II) to be rounded to the nearest
hundredth, what proportion of these observations are not less than 0.395 but less
than or equal 0.535? (Type your answer in decimal form and round it to the…
An article reported on a study in which each of 13 workers was provided with both a conventional shovel and a shovel whose blade was perforated with small holes. The authors of the cited article provided the following data on energy expenditure
[kcal/kg(subject)/lb(clay)].
Worker:
2
4
5
6
Conventional: 0.0015 0.0015 0.0018 0.0022 0.001
0.0016 0.0028
Perforated:
0.0015 0.001
0.0019 0.0013 0.0011
0.0017 0.0024
Worker:
10
11
12
13
Conventional: 0.0021 0.0015 0.0014 0.0023 0.0017 0.002
Perforated:
0.0021 0.0013 0.0013 0.0017 0.0015
0.0013
n USE SALT
Do these data provide convincing evidence that the mean energy expenditure using the conventional shovel exceeds that using the perforated shovel? Test the relevant hypotheses using a significance level of 0.05. (Use SALT to calculate the P-value. Use
Hd = Hconventional - Hperforated Round your test statistic to one decimal place and your P-value to three decimal places.)
t=
df =
p-value =
State your conclusion.
O we fail to reject H,. We have…
In a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the Southern California Air Basin. The pollution intake is the amount of exhaust emissions, in grams per person, that would be inhaled while traveling on the bus during its usual 1818‑mile trip on congested freeways from South Central LA to a magnet school in West LA. (As a reference, the average intake of motor emissions of carbon monoxide in the LA area is estimated to be about 0.0000460.000046 grams per person.) The amounts for the nine buses when driven with the windows open are given.
1.151.15
0.330.33
0.400.40
0.330.33
1.351.35
0.380.38
0.250.25
0.400.40
0.350.35
A good way to judge the effect of outliers is to do your analysis twice, once with the outliers and a second time without them. Give two 90%90% confidence intervals, one with all the data and one with the outliers removed, for the mean pollution intake among all school buses…
Chapter 3 Solutions
Introduction to Statistics and Data Analysis
Ch. 3.1 - Each person in a nationally representative sample...Ch. 3.1 - The graphical display on the next page is similar...Ch. 3.1 - Prob. 3ECh. 3.1 - The National Confectioners Association asked 1006...Ch. 3.1 - College student attitudes about e-books were...Ch. 3.1 - Prob. 6ECh. 3.1 - Prob. 7ECh. 3.1 - Prob. 8ECh. 3.1 - Prob. 9ECh. 3.1 - The survey on student attitude toward e-books...
Ch. 3.1 - Prob. 11ECh. 3.1 - Prob. 12ECh. 3.1 - An article about college loans (New Rules Would...Ch. 3.1 - Prob. 14ECh. 3.2 - Prob. 15ECh. 3.2 - Prob. 16ECh. 3.2 - Prob. 17ECh. 3.2 - The article Economy Low, Generosity High (USA...Ch. 3.2 - Prob. 19ECh. 3.2 - A report from Texas Transportation Institute...Ch. 3.2 - The percentage of teens not in school or working...Ch. 3.3 - Prob. 22ECh. 3.3 - The accompanying data on annual maximum wind speed...Ch. 3.3 - The accompanying relative frequency table is based...Ch. 3.3 - Prob. 25ECh. 3.3 - Medicares new medical plans offer a wide range of...Ch. 3.3 - The following two relative frequency distributions...Ch. 3.3 - Prob. 28ECh. 3.3 - The report Trends in College Pricing 2012...Ch. 3.3 - An exam is given to students in an introductory...Ch. 3.3 - The accompanying frequency distribution summarizes...Ch. 3.3 - Example 3.19 used annual rainfall data for...Ch. 3.3 - Prob. 33ECh. 3.3 - Prob. 34ECh. 3.3 - Prob. 35ECh. 3.3 - Prob. 36ECh. 3.3 - Using the five class intervals 100 to 120, 120 to...Ch. 3.4 - Prob. 38ECh. 3.4 - Consumer Reports Health (consumerreports.org) gave...Ch. 3.4 - Prob. 40ECh. 3.4 - Prob. 41ECh. 3.4 - Prob. 42ECh. 3.4 - Prob. 43ECh. 3.4 - Prob. 44ECh. 3.4 - The accompanying time series plot of movie box...Ch. 3.5 - The accompanying comparative bar chart is similar...Ch. 3.5 - Prob. 47ECh. 3.5 - The figure at the top right of the next page is...Ch. 3.5 - The two graphical displays below are similar to...Ch. 3.5 - The following graphical display is similar to one...Ch. 3.5 - Explain why the following graphical display...Ch. 3 - Prob. 52CRCh. 3 - Prob. 53CRCh. 3 - Prob. 54CRCh. 3 - The Connecticut Agricultural Experiment Station...Ch. 3 - The stem-and-leaf display of Exercise 3.55 uses...Ch. 3 - Prob. 57CRCh. 3 - Prob. 58CRCh. 3 - Does the size of a transplanted organ matter? A...Ch. 3 - Prob. 60CRCh. 3 - Prob. 61CRCh. 3 - Prob. 62CRCh. 3 - The article Tobacco and Alcohol Use in G-Rated...Ch. 3 - Prob. 64CRCh. 3 - Prob. 65CRCh. 3 - Prob. 66CRCh. 3 - Prob. 67CRCh. 3 - Prob. 68CRCh. 3 - Prob. 69CRCh. 3 - Many nutritional experts have expressed concern...Ch. 3 - Americium 241 (241Am) is a radioactive material...Ch. 3 - Does eating broccoli reduce the risk of prostate...Ch. 3 - An article that appeared in USA TODAY (August 11,...Ch. 3 - Sometimes samples are composed entirely of...Ch. 3 - Prob. 4CRECh. 3 - More than half of Californias doctors say they are...Ch. 3 - Based on observing more than 400 drivers in the...Ch. 3 - An article from the Associated Press (May 14,...Ch. 3 - Prob. 8CRECh. 3 - Prob. 9CRECh. 3 - Prob. 10CRECh. 3 - The article Determination of Most Representative...Ch. 3 - The paper Lessons from Pacemaker Implantations...Ch. 3 - How does the speed of a runner vary over the...Ch. 3 - Prob. 14CRECh. 3 - One factor in the development of tennis elbow, a...Ch. 3 - An article that appeared in USA TODAY (September...
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