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Description: courses / 55_MATH4130_S1 / All Assessment details / Midterm Exam QuestionsIf the class mid points in a frequency distribution of age of a group of persons are 14, 22, 30, 38, 46, 54, thewidth of the class interval is6.None of theseO 8Next pageCDP MA

Math

Probability

If the class mid points in a frequency distribution of age of a group of persons are 14, 22, 30, 38, 46, 54, the width of the class interval is

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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If the upper class limits of the first two classes in a frequency table with equal class widths (lengths) are 30 and 38, respectively, then the midpoint (center) of the second class is а. 15 O b. 33.5 О с. 34.5 O d. 19 О е. 34
Illustration. If the class mid-points in a frequency distribution of a group of persons are 125, 132, 139, 146, 153, 160, 167, 174 and 181 lbs,fmd: (i) Size of class-interval; (ii) Class-boundaries; (iii) Class-limits assuming that the weights are measured to the nearest pound.
5. The female students in an undergraduate engineering core course at UH self-reported their heights to the nearest inch. The data is as follows. 62 64 61 67 65 68 61 65 60 65 64 63 59 68 64 66 68 69 65 67 62 66 68 67 66 65 69 65 69 65 67 67 65 63 64 67 65 First construct the frequency distribution Table like Table 6-4 on Page 213 of textbook where you only need to specify the classes/bins, frequency info. Then using the table to create the histogram; here let the height of rectangle (for each bin) equal to the frequency instead of relative frequency in your histogram even though you can also set the height as the relative frequency. Hint: create the frequency distribution table by hand, but you can create the histogram in Excel and insert the result as a figure.
32, 39, #6, 53 and 60, find: 6. If the class mid-points in a frequency distribution of age of a group of persons are (a) the size of the class interval, (b) the class boundaries, and (C) the class limits, assuming that the age quoted is the age completed last birthday.
The amount of time (seconds) needed for assembly-line workers to complete welding was recorded for 38 workers. 10. 74 68 66 73 76 63 67 69 73 65 61 73 72 65 69 70 61 74 76 72 74 65 63 69 73 60 75 72 75 70 60 62 68 74 71 73 68 67 a) Construct a frequency distribution for these data using six classes.
Over the past several decades, the United Nations has kept records of the number of births worldwide, categorized by the age of the mother. A frequency table displaying this data for the years 1960 to 1970 is shown. Consider the class consisting of mothers between the ages of 40 and 45 years, who gave birth to an estimated 52,335,000 children worldwide between 1960 and 1970. Age of mother,in years Estimated number of occurrences,in thousands 15 – 20 125,075 20 – 25 312,055 25 – 30 300,458 30 – 35 217,581 35 – 40 131,236 40 – 45 52,335 45 – 50 10,577 Over the past several decades, the United Nations has kept records of the number of births worldwide, categorized by the age of the mother. A frequency table displaying this data for the years 1960 to 1970 is shown. Consider the class consisting of mothers between the ages of 40 and 45 years, who gave birth to an estimated 52,335,000 children worldwide between 1960 and 1970. What is the lower limit of this class?…
Identify the lower class limits, upper class limits, class width, class midpoints, and class boundaries for the given frequency distribution. Also identify the number of individuals included in the summary. a. Identify the lower class limits (in 1000cells/muL). (Type integers or decimals. Do not round. Use ascending order.) b. Identify the upper class limits (in 1000 cells/muL). (Type integers or decimals. Do not round. Use ascending order.) c. Identify the class width (in 1000 cells/muL). (Type an integer or a decimal. Do not round.) d. Identify the class midpoints (in 1000cells/muL). (Type integers or decimals. Do not round. Use ascending order.) e. Identify the class boundaries (in 1000cells/muL). (Type integers or decimals. Do not round. Use ascending order.) f. Identify the number of individuals included in the summary. (Type an integer or a decimal. Do not round.)
One of the primary goals of constructing a frequency distribution for quantitative data is to summarize the data O by showing frequency of values that lie within a class or bin. O so that there are always 7 classes or bins of data. O ensuring that the classes or bins are always of different widths. O in a manner so that each class or bin has the same number of data points.
Exhibit 1 gives a frequency distribution table of age of the individuals who are smokers. a) Using Exhibit 1 above, describe how you would find the age group which contains the median smokers. Specify the age group.
The following table gives information on the amount (in dollars) Of the electric bills for a samle of 40 families Electric bill Number of families 2 4-8 8-12 11 16-20 12-16 8 20-24 14 b) Find and interpret the cumulative relative frequencies.
The upper class boundary of one of the classes in a frequency distribution table is 135.5, and each class on the same table has a width of 25. What is the lower class limit of the said class? What is the class mark of the same class?