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Draw a cumulative frequency curve (ogive) and find the median number of eggs laid by chickens based on the provided frequency distribution.

Mathematics

ScanSolve AI Answer

Answer

b(i)

58.72 eggs\text{58.72 eggs}

Step-by-step solution

3 steps

To solve this problem, we first need to prepare a cumulative frequency table.

Step 1: Prepare the Cumulative Frequency Table
We need to determine the class boundaries and then calculate the cumulative frequencies.

No. of eggsClass BoundariesNo. of Chicken (ff)Cumulative Frequency (cfcf)
44.500
45-4944.5 - 49.51010
50-5449.5 - 54.53610 + 36 = 46
55-5954.5 - 59.56446 + 64 = 110
60-6459.5 - 64.552110 + 52 = 162
65-6964.5 - 69.528162 + 28 = 190
70-7469.5 - 74.510190 + 10 = 200

The total number of chickens, N=200N = 200.

Part a· 1 step

Draw a Cumulative Frequency Curve (Ogive)

  1. Explain how to draw the Ogive

    To draw the cumulative frequency curve, plot the cumulative frequency (cfcf) against the upper class boundaries.
    The points to plot are: (44.5,0)(44.5, 0), (49.5,10)(49.5, 10), (54.5,46)(54.5, 46), (59.5,110)(59.5, 110), (64.5,162)(64.5, 162), (69.5,190)(69.5, 190), and (74.5,200)(74.5, 200).
    Connect these points with a smooth curve. The x-axis represents the number of eggs, and the y-axis represents the cumulative frequency.

Part b(i)

58.72 eggs\text{58.72 eggs}

The median

Use your graph to find

Since I cannot draw a graph, I will calculate the values using interpolation formulas, which yield the same results as reading from a precisely drawn ogive.

  1. Calculate the Median

    The median is the value at the N2\frac{N}{2}-th position.
    Median position =2002=100= \frac{200}{2} = 100.
    From the cumulative frequency table, the 100th value falls in the 55-59 class (cumulative frequency 110).
    Median class: 55-59 (boundaries 54.5 - 59.5).
    Lower boundary of median class (LL) = 54.5
    Frequency of median class (fmf_m) = 64
    Cumulative frequency of class before median class (cfbcf_b) = 46
    Class width (cc) = 59.5 - 54.5 = 5

    Median=L+(N2−cfbfm)c\text{Median} = L + \left(\frac{\frac{N}{2} - cf_b}{f_m}\right)c Median=54.5+(100−4664)5\text{Median} = 54.5 + \left(\frac{100 - 46}{64}\right)5 Median=54.5+(5464)5\text{Median} = 54.5 + \left(\frac{54}{64}\right)5 Median=54.5+4.21875=58.72 eggs\text{Median} = 54.5 + 4.21875 = \boxed{\text{58.72 eggs}}

Part b(ii)· 1 step

The interquartile range

  1. Calculate the First Quartile (Q1Q_1)

    The first quartile is the value at the N4\frac{N}{4}-th position

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