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Statistics Assignment 1 Solutions

   

Added on  2023-06-03

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STATISTICS (STAT -101)
Assignment – 1
Student’s Name
Student’s ID
Section/CRN
Location

Question 1
Given data points
Frequency distribution
Class interval Frequency Relative frequency
12 – 16 6 0.30
17- 21 3 0.15
22 -26 7 0.35
27-31 3 0.15
32 -36 1 0.05
Total 20 1
Relative Frequency = Class frequency/Total Observations
Question 2
Frequency table
Class
Interval
Frequenc
y
Class Boundaries Class Mid-Points
1019 4 ¿(2019)/2=0.5
¿ 19+0.5=19.5
¿(10+19)/2=14.5
2029 6 ¿(3029)/2=0.5
¿ 29+0.5=29.5
¿(20+29)/2=24.5
3039 10 =(40-39 ¿/2=0.5
¿ 39+0.5=39.5
¿(30+39)/2=34.5
4049 6 =(50-49 ¿ /2=0.5
¿ 49+ 0.5=49.5
¿(40+9)/2=44.5
5059 4 =(60-59 ¿/2=0.5
¿ 59+0.5=59.5
¿(50+59)/2=54.5
1

Histogram
10 - 19 20-29 30-39 40-49 50-59
0
2
4
6
8
10
12
Histogram
Class Interval
Frequency
Question 3
Data points
5, 6, 7, 8, 9
Mean x= x
n =5+ 6+7+8+ 9
5 =7
Standard deviation of sample ¿ 1
n1 ¿ ¿ ¿
2

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