Stitistical Inference past paper

Stitistical Inference all previous/ past papers

– Stitistical Inference project-Computer Science all subject past paper  – Stitistical Inference   Problem with source code Stitistical Inference  Course – Stitistical InferenceProject idea Stitistical Inference MCQ – Stitistical Inference Interview Question  –Computer Science all courses Stitistical Inference concepts-University Past Paper – Stitistical Inference –Question paperold paper

Stitistical Inference Final  paper in 2019




Question 1

(a) Differentiate between parametric and non parametric tests? Why non parametric test are used widely?                 (3+2)

(b) Give short answers (2X3)

  1. Explain method of least square
  2. Differentiate between cyclical trend and irregular trend
  3. Differentiate between regression and correlation

Question 2

(a) A travel agency has kept the record of the number of holidays booked and the number of complaints received over the past eight years. The data is as follows: (10)

Year 2011 2012 2013 2014 2015 2016 2017 2018
Number of holidays booked (x) 246 192 221 385 416 279 343 582
Number of complaints received (y) 94 80 106 183 225 162 191 252




Construct freehand curve and calculate semi average method and three year moving average

(b) The following are the number of hours which 10 students studied for an examination and the scores they obtained:

Number of Hours Studied 8 5 11 13 10 6 14 15 2 9
Score 56 44 79 72 70 54 94 85 33 65

Calculate Spearman’s Rank Correlation coefficient.              (7)

(c) A company has the following data on its sales during the last year in each of its regions and the corresponding number of salespersons employed during this time:    (12)




Region A B C D E F
Sales(units) 236 324 298 250 246 202
Salespersons 11 12 18 15 13 10
  1. Draw a scatter diagram.
  2. Find the equation of regression line between Sales and Salespersons?
  3. Estimate sales if salespersons are 14

Question 3

Find correlation coefficient and coefficient of determination the marks of 10 students in mathematics and statistics.   (10)

Marks in statistics 42 44 48 42 32 32 44 44 48 35
Marks in mathematics 39 47 39 45 28 39 43 29 43 29

 




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