19. The following cumulative frequency and the cumulative relative frequency polygonfor the distribution of hourly wages of a sample of certified welders in the Atlanta,Georgia, area is shown in the graph.40100307520102510152030Hourly Wagea. How many welders were studied?b. What is the class interval?c. About how many welders earn less than $10.00 per hour?d. About 75% of the welders make less than what amount?e. Ten of the welders studied made less than what amount?f. What percent of the welders make less than $20.00 per hour?Percent5025LOFrequency

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Answered: 19. The following cumulative frequency…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The following are a sample of ages of respondents to a survey. 20, 40, 45, 49, 50, 50, 51, 55, 60, 80 Answer the following questions. 1. What is the class width of the frequency distribution if you are to use 7 classes? 2. Form the frequency table. Class Limits 3. What are the outliers? OA. There are no outliers OB. 80 OC. 20 OD. 20 and 80 Frequency
Construct a frequency distribution table and Show solution. Compute the following: a. Class Boundaries b. Class Mark (Midpoint) c. Tally d. Frequency e. Relative Frequency (%) f. Cumulative Frequency g. Cumulative Frequency (%) 56 48 47 42 52 58 42 37 68 40 32 46 45 41 38 34 54 57 61 53 26 45 46 44 50 30 40 56 44 39 21 49 45 51 38 63 39 33 42 37 62 48 43 41 35 43 52 28 54 36
1. The number library books read in one semester by a group of 30 second graders is given in the table at the right. Create a reasonable frequency table for this data set with exactly 5 classes. Include a relative frequency column in the table. 39 52 59 45 48 48 56 78 63 58 64 43 20 72 39 59 67 66 55 68 27 63 69 67 60 57 48 36 49 56 2. Construct an ordered stem-and-leaf plot for the data given above in #8. Then, describe the shape of the distribution of the data set (either skewed left or skewed right or symmetric). (HINT: to keep appropriate spacing, choose Times New Roman font format for cells used to display the plot and begin each entry with an apostrophe to make the values act as text versus a single number.)
1. Construct a frequency distribution of the data 2. Construct a frequency histogram of the data 3. Describe any patterns a. The classes with greatest frequency are 5 and 7. The class with the least frequency is class 1. b. The class the greatest frequency is class 6. The class with the least frequency is class 2. c. The class with the greatest frequency is class 1. The class with the least frequency is class 6. d. The class with the greatest frequency is class 1. The classes with the least frequency are classes 5 and 7.
5. Construct a histogram, frequency polygon and ogive using frequencies for the distribution of the kilometers that 100 randomly selected runners ran during a given week. Class Limit Frequency 6-10 11 11-15 12 16-20 13 21-25 15 26-30 14 31-35 13 36-40 12 41-45 10
1. Construct a frequency distribution using the ages of 50 richest people in the world in 2009. Using 8 classes. Also find class boundaries, mid points, relative frequency and cumulative frequency. 90 89 87 86 86 85 83 83 82 81 80 78 78 77 76 73 73 73 72 69 69 68 67 66 66 65 65 64 63 61 61 60 59 58 57 56 54 54 53 53 51 51 49 47 46 44 43 42 36 35 2. Following data represents the weights (in pounds) of 40 female students at a university. Construct a grouped frequency distribution for the data using 7 classes. Also find class boundaries, mid points, relative frequency and cumulative frequency of each class. 100 75 70 60 70 95 85 80 35 45 45 55 30 110 75 100 40 60 65 40 40 50 60 65 55 45 90 85 75 85 75 70 110 100 80 70 55 30 70 100 3. Construct frequency distribution, with 6 classes. Also find class boundaries, mid points, relative frequency and cumulative frequency of each class. 65 91 85 76 85 87 79 93 82 75 100 70 88 83 59 87 69 89 54 74 89 80 94 67 77 92 82 70 94 84 96 98 46 70 90 96…
C.W: The following frequency table represent the number of iPods sold within 30 days. IPods sold No. of days 5-9 3 10 - 14 6 15 - 19 8 20 - 24 8 25 – 29 5 a- Find the class boundaries and class midpoints. b- Do all classes have the same width? If yes, what is it? c- Prepare the relative frequency and percentage distribution columns. d- What percentage of the iPods sold in six days or fewer?
7. Consider the frequency distribution. Draw a Frequency Bar Graph. Be sure to label both axes and include a title. Tree Type Frequency Ash 23 Bradford Pear 16 Maple Oak 20 14 8 Birch
Average monthly wages (per employee) in 4 sectors of an economy are as follows: industry: 2000 dinars, building: 2200 dinars, agriculture: 1500 dinars, services: 1800 dinars. Number of people employed in the four sectors are 5 million, 2 million, 6 million, and 2 million, respectively. Using the concept of harmonic mean compute the average monthly wages in the economy under consideration.
Suppose a survey of adults and teens (ages 12-17) in a certain country was conducted to determine the number of texts sent in a single day. (a) Construct a relative frequency distribution for adults. (b) Construct a relative frequency distribution for teens. (c) Construct a side-by-side relative frequency bar graph. (d) Compare the texting habits of adults and teens. Number of Texts None 1-10 Adults 11-20 21-50 51-100 100+ (Round to three decimal places as needed.) (b) Complete the table below. Tech help N Number of Texts Teens None 1-10 11-20 21-50 51-100 100+ 4 R G Search or type URL 5 MacBook Pro T Y & 7 U 8 ( 9 O P Number of Texts Adults Teens D 168 17 975 247 245 139 163 None 1-10 11-20 21-50 51-100 100+ O 133 68 103 104 177 Next delete
7
3.3 Activity/Exercise Frequency Distribution and Presentation of Data: 1. Make a frequency distribution table and construct a line graph and a bar graph of the following grades using a class interval of 5. 70 71 67 90 51 70 90 91 71 65 71 72 73 74 75 76 63 65 76 79 80 71 76 54 80 72 63 87 91 90 45 67 79 81 81 58 76 72 62 51 76 76 90 71 72 89 90 76 71 88 69 66 80 79 71 75 58 50 47 67 67 52 64 88 54 70 80 92 66 81 2. Tabulate the following scores into frequency distribution using an interval of 5. Make a graph using the data in your table. 62 69 66 90 54 79 78 57 81 65 73 95 63 77 56 74 85 71 78 71 87 58 71 78 65 76 52 84 86 70 79 85 74 92 97 94 62 85 84 80 90 82 84 70 89 77 3. Below are monthly data on sales of a department store. What type of graph will best represent the data? Draw and explain the graph. Month January February March April May June July August September October November December Sales (in thousand pesos) 200 400 600 500 750 750 450 400 350 300 550 1,000

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19. The following cumulative frequency and the cumulative relative frequency polyge for the distribution of hourly wages of a sample of certified welders in the Atlant Georgia, area is shown in the graph. 40 100 30 75 50 10 25 Frequency 20 Percent