Consider the following data on the length of eggs (mm) of two breeds of cuckoo 22.520.123.322.922.023.122.022.323.624.720.1020.1120.1220.1320.1420.1520.1620.120.1820.1822.522.320.1822.020.1523.323.3622.323.3820.1022.022.9123.3622.9322.9423.320.1123.622.9822.9 a. Use a class interval of size 22.00, construct a grouped frequency distribution. b. Find first and third Quartile of the distribution c. Obtain the mean and standard deviation d. Show whether second quartile is same as the median of the distribution and comment on your result.
Q. Consider the following data on the length of eggs (mm) of two breeds of cuckoo 22.520.123.322.922.023.122.022.323.624.720.1020.1120.1220.1320.1420.1520.1620.120.1820.1822.522.320.1822.020.1523.323.3622.323.3820.1022.022.9123.3622.9322.9423.320.1123.622.9822.9 a. Use a class interval of size 22.00, construct a grouped frequency distribution. b. Find first and third Quartile of the distribution c. Obtain the mean and standard deviation d. Show whether second quartile is same as the median of the distribution and comment on your result.
Construct Frequency Distribution: Step 1: Construct a grouped frequency distribution using a class interval of size 5.- Start with the smallest value, which is 20.1, and create intervals up to the largest value, which is 24.7.- Intervals: [20−25)- Count the number of eggs in each interval.- Frequency: 40 (since all values fall within this interval).
Find Quartiles: Step 2: Find the first and third quartiles of the distribution.- Since all values are in one interval, approximate quartiles by dividing the total number of data points.- First Quartile (Q1) = 25th percentile = 10th data point when sorted.- Third Quartile (Q3) = 75th percentile = 30th data point when sorted.- Sorted data: 20.1,20.1,20.4,20.6,20.9,21.0,21.7,21.7,21.9,21.9,21.9,22.0,22.0,22.0,22.0,22.1,22.2,22.2,22.3,22.3,22.3,22.5,22.5,22.7,22.8,22.9,22.9,23.1,23.3,23.3,23.3,23.6,23.6,23.7,23.7,24.0,24.0,24.2,24.4,24.7.- Q1=21.9, Q3=23.3.
Calculate Mean and Standard Deviation: Step 3: Calculate the mean and standard deviation.- Mean = (Sum of all values) / Total number of values.- Sum = 891.9, Total values = 40.- Mean = 891.9/40=22.2975.- Standard deviation = (Σ(x−mean)2)/n.- Calculations for variance: Σ(x−22.2975)2=118.6761, Variance = 118.6761/40=2.9669.- Standard deviation = 2.9669=1.7225.
Check Median vs. Second Quartile: Step 4: Check if the second quartile is the same as the median.- Second Quartile (Median) = 50th percentile = 20th data point when sorted.- Median = 22.15.- Since the median (22.15) is not exactly the same as the calculated second quartile (22.2975), they are slightly different.
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