(a)
To calculate: The probability distribution, expected value, and the standard deviation of the random variable X if X is the number of orders per million residents in U.S. city selected randomly, and the count of online orders at OHaganBooks.com per million residents in
Orders per million residents | |||||
Number of cities |
(b)
To calculate: The range of orders per million residents from approximately
Orders per million residents | |||||
Number of cities |
(c)
The actual percentage of cities from which between
Want to see the full answer?
Check out a sample textbook solutionChapter 8 Solutions
Bundle: Finite Mathematics, Loose-leaf Version, 7th + WebAssign Printed Access Card for Waner/Costenoble's Finite Mathematics, 7th Edition, Single-Term
- A local, family-owned restaurant also gathered data for two weeks of orders. The following set of data represents the number of orders filled by this restaurant during a two week period. Construct a five number summary for the the data. 82, 81, 65, 62, 86, 81, 83, 62, 81, 81, 68, 71, 85, 62, 87 (Round to the nearest hundredth, if needed). Min _______________________ Lower Quartile _______________________ Median ________________________ Upper Quartile _________________________ Maximum __________________________ What is the range and interquartile range for the family-owned restaurant? Range ___________________________ Interquartile Range ____________________________ Considering this data only, did the national-chain restaurant or the family-owned restaurant do better for the past two weeks? _______________________________________arrow_forwardNonearrow_forwardFind the mode of this set of data: 24, 27, 32, 29, 31, 35, 27, 32, 23, 25, 30, 24, 30, 35, 40arrow_forward
- Johnson Filtration, Inc. provides maintenance service for water-filtration systems. Suppose that in addition to information on the number of months since the machine was serviced and whether a mechanical or an electrical repair was necessary, the managers obtained a list showing which repairperson performed the service. The revised data follow. Click on the datafile logo to reference the data. DATA file Repair Time Months Since in Hours Last Service Type of Repair Repairperson 2.9 Electrical Dave Newton 3.0 Mechanical Dave Newton 4.8 8. Electrical Bob Jones 1.8 Mechanical Dave Newton 2.9 Electrical Dave Newton 4.9 Electrical Bob Jones 4.2 6. Mechanical Bob Jones 4.8 8. Mechanical Bob Jones 4.4 4. Electrical Bob Jones 4.5 Electrical Dave Newton a. Ignore for now the months since the last maintenance service (1 ) and the repairperson who performed the service. Develop the estimated simpe linear regression equation to predict the repair time (y) given the type of repair (2 ). Recall that…arrow_forwardThe following table shows the number of hours a cleaning company spends cleaning apartments. Time (hours) 4. Apartments Cleaned 6. 9. 12arrow_forwardThe table to the right shows the arrival data for two airlines in five cities. Complete parts (a) through (c) below. Excelsior Airlines Percentage Number of on-time arrivals Destination Los Angeles 94.5% Phoenix 95.7% San Diego 94.4% San Francisco 83.5% 85.9% Seattle Total 440 277 101 631 2183 3632 Paradise Airlines Percentage Number of on-time arrivals 87.9% 94.6% 88.6% 75.6% 72.8% 821 5177 406 405 259 7068 a. Which airline has the higher percentage of on-time flights to the five cities? Excelsior Airlines has the higher percentage of on-time flights. b. Compute the percentage of on-time flights for the two airlines over all five cities. Over all five cities, Excelsior Airlines had an on-time percentage of % and Paradise Airlines had an on-time percentage of %. (Round to the nearest tenth as needed.)arrow_forward
- During one shift, the express lane clerk recorded how many times customers violated the "10 items or less" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized in the histogram below. NOTE: The last class actually represents "7 or more items," not just 7 items. 14+ 12- 10- 8 6- 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 # items over 10 What is the frequency of times the limit was exceeded by more than 6 items? ans = Question Help: D Video Submit Question O Type here to search a %24 4. %23 3. WER T A SD F G H douanbaarrow_forwardA local postal carrier distributes letters, magazines, advertisements (ads), or billing statements. For a certain week a messenger distributed the following number of each type of item. magazines TOTAL Delivered to: Letters Home Business TOTAL ads billing ... 39 35 4 86 2 14 45 40 10 100 Find P(letter or billing). Answer in decimal up to four significant decimals. Blank 1arrow_forwardYou recently received a job with a company that manufactures an automobile anti theft device. To conduct an advertising campaign for the product, you need to make a claim about the number of automobile thefts per year. Since the population of various cities in the United States varies, you decide to use rates per 10,000 people. (The rates are based on the number of people living in the cities.) Your boss said that last year the theft rate per 10,000 people was 44 vehicles. You want to see if it has changed. The following are rates per 10,000 people for 36 randomly selected locations in the United States. Assume σ = 30.3. U s e α = 0.05 Car Thefts 55 42 125 62 134 73 39 69 23 94 73 24 51 55 26 66 41 67 15 53 56 91 20 78 70 25 62 115 17 36 58 56 33 75 20 16 Use the traditional method to conduct the hypothesis test. a/ Write the conjuncture b/ Find the critical value(s) c/ Find the test value d/ Make a decision e/ Write the summaryarrow_forward
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
- Functions and Change: A Modeling Approach to Coll...AlgebraISBN:9781337111348Author:Bruce Crauder, Benny Evans, Alan NoellPublisher:Cengage Learning