no. of letters 1-4,4-7,7-10,10-13,13-16,16-19 no. of surnames 6,30,40,

1.	no. of letters 1-4,4-7,7-10,10-13,13-16,16-19 no. of surnames 6,30,40,16,4,4 find median no. of letters in surnames
Answer» ANSWER: Median no. of letters in surnames = 8.05 . Step-by-step explanation: The given frequency distribution is ; No. of letters f Cumulative frequency,F 1 - 4 6 6 4 - 7 30 36 7 - 10 40 76 10 - 13 16 92 13 - 16 4 96 16 - 19 4 100 ∑ f = 100 Now, the median formula is given by = $x_L + \frac{\frac{N}{2} - F_L }{f_m} * c$ where, $x_L$ = Lower limit of median class N = Total Frequency $f_m$ = frequency of median class $F_L$ = cumulative frequency of just above the median class frequency c = width of median class So, First we calculate $\frac{N}{2}$ = $\frac{100}{2}$ = 50 . Here, the cumulative frequency just GREATER than or equal to 50 is 76. Hence, the median class is 7 - 10 . And $x_L$ = 7 N = 100 $f_m$ = 40 $F_L$ = 36 c = 3 Putting all these values in median formula we get, Median = $7 + \frac{\frac{100}{2} - 36 }{40} * 3$ = 8.05 . Other links for similar questions; https://brainly.com/question/8847267 brainly.in/question/2883821