Business Statistics: A First Course (8th Edition)
8th Edition
ISBN: 9780135177785
Author: David M. Levine, Kathryn A. Szabat, David F. Stephan
Publisher: PEARSON
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2. A group of artists have decided to produce hand-drawn cards for Valentine's Day, and donate the money to the American Heart Association. The artists plan to produce ink drawings
and watercolors. They have volunteered to spend 120 hours of preparation time, and 60 hours of packaging time. It takes 0.3 hours to prepare each ink drawing, and 0.5 hours to
prepare each watercolor. It takes 0.2 hours to package each of the cards.
Let a represent the number of ink drawings. Let y represent the number of watercolors.
Which set of inequalities represents this situation?
2. Ms. Liu tells you that on each weekday, visitors return to her website an average of twice, and on weekends, visitors return
four times per day. She adds that these two groups of users are different. She wants to know how many unique visitors (i.e., the
number of users who visit the site, regardless of the number of their visits) visit her site on weekdays and weekends. Please note that if
a particular visitor comes to the site every day or several times a day, it still counts as only one visit.
A
B
D
Unique
Visitors
1
Visits
# of Visits
# of Days
2
Kentville, a community of 10,000 people, resides next to a krypton mine, and there is a concern that the emission from the krypton smelter have resulted in adverse effects. Specifically, Kryptonosis seems to have killed 12 of Kentville’s inhabitants last year. A neighboring community, Lanesburg, has 25,000 inhabitants and is far enough from the smelter to not be affected by the emission. In Lanesburg, only three people last year died of Kryptonosis. Given that the number of deaths in Kentville and their causes last year were: Heart attack=7 Accidents=4 Kryptonosis=12 Other=6
What is the risk of dying of Kryptonosis in Kentville relative to non-contaminated locality?What is the risk of dying of Kryptonosis in Kentville relative to deaths due to other causes? How many times the chance of dying of Kryptonosis compared to dying of accidents ? How many times the chance of dying of Kryptonosis compared to Other causes?
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- If during the following year it is predicted that each comedy skit will generate 30 thousand and each musical number 20 thousand, find the maximum income for the year. A television program director must schedule comedy skits and musical numbers for prime-time variety shows. Each comedy skit requires 2 hours of rehearsal time, costs 3000, and brings in 20,000 from the shows sponsors. Each musical number requires 1 hour of rehearsal time, costs 6000, and generates 12,000. If 250 hours are available for rehearsal and 600,000 is budgeted for comedy and music, how many segments of each type should be produced to maximize income? Find the maximum income.arrow_forward2. An aircraft emergency locator transmitter (ELT) is a device designed to transmit a signal in the case of a crash. The Altigauge Manufacturing Company makes 80% of the ELTS, the Bryant Company makes 15% of them, and the Chartair Company makes the other 5%. The ELTs made by Altigauge have a 4% rate of defects, the Bryant ELTs have a 6% rate of defects, and the Chartair ELTs have a 9% rate of defects (which helps to explain why Chartair has the lowest market share). a) If an ELT is randomly selected from the general population of all ELTS, find the probability that it was made by the Altigauge Manufacturing Company. b) If a randomly selected ELT is then tested and is found to be defective, find the probability that it was made by the Altigauge Manufacturing Company. What is the probability that the ELT was made by Bryant Company given that the selected ELT was tested and found to be non-defective?arrow_forward
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