Network forensic analysis. A network forensic analyst is responsible for identifying worms, viruses, and infected nodes in the computer network. A new methodology for finding patterns in data that signify infections was investigated in IEEE Transactions on Information Forensics and Security (May, 2013). The method uses multiple filters to check strings of information. For this exercise, consider a data string of length 4 bytes (positions), where each byte is either a 0 or a 1 (e.g., 0010). Also, consider two possible strings, named S1 and S2. In a simple single-filter system, the
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Chapter 4 Solutions
Statistics for Business and Economics (13th Edition)
- A wood products firm uses leftover time at the end of each week to make goods for stock. Currently, there are two products on the list of items that are produced for stock: a chopping board and a knife holder. Both items require three operations: cutting, gluing, and finishing. The manager of the firm has collected the following data on these products: ------------------------------------------------------- Time per unit (minutes) Profit ---------------------------- Item per unit Cutting Gluing Finishing ------------------------------------------------------- Chopping board $ 4 1.4 5 12 Knife holder $ 6 1.8 13 3 ------------------------------------------------------- The manager has also determined that during each week 120 minutes are available for cutting, 650 minutes are available for gluing, and 360…arrow_forwardyou are asked to create a stemplot for a collection of four digit pieces of data: 6574, 2089, 8891, 6452, 1446, 7799. What is the optimal number of digits in each stem?arrow_forwardA1 1 2 3 7 5 5 7 B 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 A Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 X B Discharged_Patients A 54 63 110 105 131 137 80 63 75 92 105 112 120 95 72 128 126 106 129 136 94 74 107 135 124 113 140 83 62 106 fx Day с Records_not_Processed 18 18 52 29 70 57 26 29 14 27 49 38 47 26 28 49 45 39 27 38 44 25 29 62 44 60 46 38 25 39 D E F G H I Jarrow_forward
- This is Engineering Data Analysisarrow_forwardFour different paints are advertised as having the same drying time. To check the manufacturer's claims, five samples were tested for each of the paints. The time in minutes until the paint was dry enough for a second coat to be applied was recorded. The following data were obtained. Excel users: The data set is available in file named Paint. All data sets can be found on the premium online datasite. Click on the datafile logo to reference the data. (the excel data is below) Paint 1 Paint 2 Paint 3 Paint 4 128 144 133 150 137 133 143 142 135 142 137 135 124 146 136 140 141 130 131 153 At the A=0.05 level of significance, test to see whether the mean drying time is the same for each type of paint. Compute the values identified below (to 2 decimals, if necessary). Sum of Squares, Treatment Sum of Squares,…arrow_forwardA manager of a large corporation recommends a $10,000 raise be given to keep a valuedsubordinate from moving to another company. What internal and external sources of datamight be used to decide whether such a salary increase is appropriate?arrow_forward
- A healthcare provider notices an outbreak of foodborne illness among individuals who attended a holiday cookout. Which study type would be most beneficial in identifying the source of the outbreak?arrow_forwardA sociologist randomly selects 388 females 15 to 19 years old and asks each complete parts (a) through (f) below. E Click the icon to view the data table of family structure and sexual activity. disclose her family structure at age 14 and whether she has had sexual intercourse. Use the results in the accompanying table to DA Hy: Sexual activity ana tamiy structure are oepenaent. H,: Sexual activity and family structure are independent. Data table of family structure and sexual activity OB. H: P, =P, =P3 =P4 H,: At least one proportion is different from the others. Both Biological or Adoptive Parent and Stepparent Non-parental E Guardian Single Parent YC. H: Sexual activity and family structure are independent. H, Sexual activity and family structure are dependent. Had sexual intercourse Parents Yes 61 63 33 46 OD. H P = E, and , =E, and u, =E, and u = E H,: At least one mean is different from what is expected. No 40 88 20 (d) Compute the chi-square test statistic. Print Done Z = (Round…arrow_forwardA certain species of tree has an average life span of 130 years. A researcher has noticed a large number of trees of this species washing up along a beach as driftwood. She takes core samples from 27 of those trees to count the number of rings and measure the widths of the rings. Counting the rings allows the researcher to determine the age of each tree. Her data are displayed in the provided table. 98 79 147 200 130 60 51 127 105 75 120 113 200 190 81 98 160 165 134 62 152 66 68 124 190 159 60 One of her interests is determining if this sample provides evidence that the average age of the driftwood is less than the 130 year life span expected for this type of tree. If the average age is less than 130 years it might suggest that the trees have died from unusual causes, such as invasive beetles or logging. Use technology to create a randomization distribution with at least 1,000 values…arrow_forward
- A magazine published a study on the ammonia levels near the exit ramp of a highway tunnel. The data in the table below represent daily ammonia concentrations (in parts per million) on eight randomly selected days during the afternoon drive time. Complete parts a through c.arrow_forwardA local bank has two branches in a cty: one in the business center of the city and another-in a residential area. The bank's operations manager wants to Improve front-office employee scheduling during the lunch hour (12:00-13:00) period. The manager starts with studying the customer walting times at the two branches and collects data for two groups of 35 customers at each branch. Customers at the business-center branch walted on average 3.8 minutes, whle those at the residential branch waited 4.4 minutes on average, Assume that the population standard deviations are 1.8 (business-center branch) and 2.5 tresidential branch). a. Considering the real-ife problem, determine the point estimate of the unknown quantity that needs to be estimated. (Round to two decimal places.) b. Determine the critical value needed to compute a Bs confidence interval (Round to two decimal places.) c. Compute the confidence interval the operations manager would be interested in computing using the confidence…arrow_forwardA college student is interested in whether presoaking time has an effect on cleanliness of clothing. He collects the dirty clothes from all of the people in his dorm and randomly assigns clothing to one of four presoak time conditions: 5 minutes, 10 minutes, 15 minutes, 20 minutes. He then asks members of another dorm to rate the cleanliness of the items (they don’t know which clothing got which soaking time). The data are presented below. A) Perform an ANOVA by hand (SHOW ALL OF YOUR WORK by taking a photo of your handwork and either inserting it into the word document or uploading it as a separate file.) B) ANSWER QUESTION: Did the college student reject the null hypothesis? (yes or no)arrow_forward
- Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin HarcourtMathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,