Math2565(AssignmentONE)S23EClass

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School
Queens University **We aren't endorsed by this school
Course
MATH 2565
Subject
Statistics
Date
Aug 7, 2023
Pages
5
Uploaded by JusticeNightingalePerson98 on coursehero.com
Assignment #1 MATH2565(SOLUTION) Question 1 sample mean = 281 25 . 90 75 . 95 83 . 74 281 + = = n x x = $74.85 Median = $69.15 Question 2 mean profit per store = 74600 $ 120 8952000 $ = = = n x x
Question 3 [ 23 marks] Stem(tens) Leaf 1 2 3 99 001239 18 4 5 6 7 8 0 9 2 b. sample mean = 5 . 34 12 414 = = = n x x location for median = th n 5 . 6 2 1 12 2 1 = + = + 6th=22 , 7th=23 Median= 5 . 22 2 23 22 = + Mode= 19 and 20 c. sample standard deviation = ( ) 1 2 2 = n n x x s ( ) 1 12 12 414 21086 2 = = 24.869 Interquartile range = 1 3 Q Q IQR = = 34.5 - 20 = 14.5 d. Five-Number Summary : min Q 1 median Q 3 max 19 20 22.5 34.5 92 e. right-skewed ( positively skewed) f. median. Outlier g. Interquartile range. Outlier
Question 4 a. the first quartile= $69000, the second quartile= $78000, the lowest annual salary = $57000 b. Five-Number Summary : min Q 1 median Q 3 max $57000 $69000 $78000 $108000 $138000 c. 1539699121 $ 2 2 = s Question 5. Total amount spent by female young professionals =$83700 - 14x$4000 = $27700 The mean amount spent by female young professional 67 . 4616 $ 6 27700 $ = = = n x x Question 6. Solution B Question 7. Solution G Question 8. Solution K
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