EP STATISTICS F/BUS.+ECON.-ACCESS 18 WK
13th Edition
ISBN: 9780135960912
Author: MCCLAVE
Publisher: PEARSON CO
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Chapter 1, Problem 1.39ACA
Sampling TV markets for a court case. A recent court case involved a claim of satellite television subscribers obtaining illegal access to local TV stations. The defendant (the satellite TV company) wanted to sample TV markets nationwide and determine the percentage of its subscribers in each sampled market who have illegal access to local TV stations. To do this, the defendant's expert witness drew a rectangular grid over the continental United States, with horizontal and vertical grid lines every .02 degrees of latitude and longitude, respectively. This created a total of 500 rows and 1,000 columns, or (500)(1,000) = 500,000 intersections. The plan was to randomly sample 900 intersection points and include the TV market at each intersection in the sample. Explain how you could use a random number generator to obtain a random sample of 900 intersections. Develop at least two plans: one that numbers the intersections from 1 to 500,000 prior to selection and another that selects the row and column of each sampled intersection (from the total of 500 rows and 1,000 columns).
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Activity 1
Directions: Answer the following question. Use Microsoft Excel if necessary.
1. An insurance company would like to determine the proportion of all medical doctors who have
been involved in one or more malpractice lawsuits. The company selects 500 doctors at random
from a professional directory and determines the number in the sample who have been involved
in a malpractice lawsuit. Identify the following:
a. Population
b. Sample
c. Variable
d. Level of Measurement used
2. Determine the correct data type (quantitative or qualitative). Indicate whether quantitative data
are continuous or discrete the following:
a. the number of pairs of shoes you own
b. the type of car you drive
c. the distance from your home to the nearest grocery store
3. The Whitcomb Company manufactures a metal ring for industrial engines that usually weig
about 50 ounces. A random sample of 50 of these metal rings produced the following weights (in
ounces).
51
53
56
50
44
47
53
53
42
57
46
55
41
44
52 56…
Need help with last part in the box.
Cloud seeding, a process in which chemicals such as silver iodide and frozen carbon dioxide are
introduced by aircraft into clouds to promote rainfall was widely used in many years. Recent research has
questioned its effectiveness. An experiment as performed by randomly assigning 52 clouds to be seeded
or not. The amount of rain generated was then measured in acre-feet. The box plot of the data for the
seeded and unseeded clouds are shown in the figure. Which statement best interprets the box plot.
Boxplot of Seeded, Unseeded
3000 f
2500어
2000 -
1500 -
1000 -
500-
Seeded
Unseeded
a. Cloud seeding is somewhat effective in promoting rainfall because of the greater mean
b. Outliers for both seeded and unseeded data may prove data on the effectiveness of cloud seeding is insufficient
c. Extreme outliers are evident in the seeded data and has greater variance
O d. There's a greater mean and greater dispersion in the seeded data. Both plots show outliers
Data
Chapter 1 Solutions
EP STATISTICS F/BUS.+ECON.-ACCESS 18 WK
Ch. 1 - What is statistics?Ch. 1 - Explain the difference between descriptive and...Ch. 1 - List and define the four elements of a descriptive...Ch. 1 - List and define the five elements of an...Ch. 1 - List the three major methods of collecting data...Ch. 1 - Explain the difference between quantitative and...Ch. 1 - Explain how populations and variables differ.Ch. 1 - Explain how populations and samples differ.Ch. 1 - What is a representative sample? What is its...Ch. 1 - Why would a statistician consider an inference...
Ch. 1 - Explain the difference between a population and a...Ch. 1 - Define statistical thinking.Ch. 1 - Suppose youre given a data set that classifies...Ch. 1 - Suppose that a population contains 200,000...Ch. 1 - The Random Numbers applet generates a list of n...Ch. 1 - The Random Numbers applet can be used to select a...Ch. 1 - Applying the ConceptsBasic 1.15 Performance-based...Ch. 1 - Jamming attacks on wireless networks. Terrorists...Ch. 1 - Disaggregation of annually reported accounting...Ch. 1 - College application data. Colleges and...Ch. 1 - Opinion polls. Pollsters regularly conduct opinion...Ch. 1 - Cybersecurity survey. The information systems...Ch. 1 - Treasury deficit prior to the Civil War. In Civil...Ch. 1 - The lucky store effect in lottery ticket sales. In...Ch. 1 - Consumer recycling behavior. Under what conditions...Ch. 1 - Who is better at multi-tasking? In business,...Ch. 1 - Zillow.com estimates of home values. Zillow.com is...Ch. 1 - Drafting NFL quarterbacks. The National Football...Ch. 1 - The economic return to earning an MBA. What are...Ch. 1 - Corporate sustainability and firm characteristics....Ch. 1 - Inspection of highway bridges. All highway bridges...Ch. 1 - Structurally deficient highway bridges. Refer to...Ch. 1 - Monitoring product quality. The Wallace Company of...Ch. 1 - Guilt in decision making. The effect of guilt...Ch. 1 - Accounting and Machiavellianism. Behavioral...Ch. 1 - Can money spent on gifts buy love? Is the gift you...Ch. 1 - Random-digit dialing. To ascertain the...Ch. 1 - Current population survey. The employment status...Ch. 1 - Monitoring the production of soft-drink cans. The...Ch. 1 - Sampling TV markets for a court case. A recent...Ch. 1 - Critical Thinking Challenge 1.40 20/20 survey...
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