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STA 301 ASSIGNMENT 01 FALL 2014 DUE DATE 02/12/2014

Question 1: (Marks: 5)

a)      Construct a frequency distribution table where the class interval is 12, the number of classes is 6 and the smallest observation is 49 (lowest class limit). Also build the column of the relative frequency. The data is given below:

74, 49, 103, 95, 90, 118, 52, 88, 101, 96, 72, 56, 64, 110, 97, 59, 62, 96, 82, 65, 85, 105, 116, 91, 83, 99, 52, 76, 84, 90.

Question 2: (Marks: 5)

a)      Compute the mean deviation from the mean for the following data.

(Where Mean = 3.949)

 X f 2.8 4 3.0 15 3.2 20 3.4 47 3.6 63 3.8 78 4.0 88 4.2 69 4.4 59 4.6 35 4.8 10 5.0 8 5.2 4 500

Question 3:                                                                                                        (Marks: 3+2=5)

a)      The ages of 22 football players are listed below:

66, 73, 68, 54, 25, 38, 67, 69, 74, 53, 52, 72, 55, 75, 37, 24, 13, 12, 11, 26, 39, 23

Make a stem and leaf display for the data.

b)      Which variable (Discrete or Continuous) is more suitable in the following examples?

• The content of a bottle of fluid is quoted as 1025 ml.
• People are asked to state their age at their birthday.
• People are asked to state how many times in the last month they visited their family doctor.
• The height of trees at a nursery.

Rules for Marking

It should be clear that your Assignment will not get any credit IF:

• The Assignment submitted, via email, after the due date.
• The submitted Assignment is not found as an MS Word document file.
• There will be unnecessary, extra or irrelevant material.
• The Statistical notations/symbols are not well-written, i.e., without using MathType software.
• The Assignment will be copied from handouts, internet or from any other student’s file. Copied material (from handouts, any book or by any website) will be awarded ZERO MARKS. It is PLAGIARISM and an Academic Crime.
• The medium of the course is English. Assignment in Urdu or Roman languages will not be accepted.
• An assignment means Comprehensive yet precise, accurate details about the given topic, quoting different sources (books/articles/websites etc.). Do not rely only on handouts. You can take data/information from different, authentic sources (like books, magazines, website, etc.) BUT express/organize all the collected material in YOUR OWN WORDS. Only then you will get good marks.

Objective(s) of this Assignment:

• The assignment is being uploaded to build up the concepts about:
• Variable
• Frequency Distribution
• Stem and Leaf
• Measure of Dispersion

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QUESTION 2 main 186.35/500 ho ga ya 186.35/13 hoga kyun k "n" 13 hai

a)      Construct a frequency distribution table where the class interval is 12, the number of classes is 6 and the smallest observation is 49 (lowest class limit). Also build the column of the relative frequency. The data is given below:

74, 49, 103, 95, 90, 118, 52, 88, 101, 96, 72, 56, 64, 110, 97, 59, 62, 96, 82, 65, 85, 105, 116, 91, 83, 99, 52, 76, 84, 90.

 Classes Limit Frequency (f) Relative frequency Rf= 49 - 60 5 5/30 = 0.167 61 - 72 4 4/30 = 0.133 73 - 84 5 5/30 = 0.167 85 - 96 8 8/30 = 0.267 97-108 5 5/30 = 0.167 109 - 120 3 3/30 = 0.100

SHOAIB AHMED "n" 500 ho ga, M.D= 186.346 / 500 = 0.372692

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