Find the mean and variance and standard deviation using short-cut method. Height in cms) (no.of children) 70-75. 3 75-80. 4 80-85. 7 85-90. 7 90-95. 15 95-100. 9 100-105. 6 105-110. 6 110-115. 3

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Find the mean, variance and standard deviation using short-cut method

Height in cms	No. of children
70-75	3
75-80	4
80-85	7
85-90	7
90-95	15
95-100	9
100-105	6
105-110	6
110-115	3

Find the mean, variance and standard deviation using short-cut method

$\begin{matrix} Height in cm & 70 - 75 & 75 - 80 & 80 - 85 & 85 - 90 & 90 - 95 & 95 - 100 & 100 - 105 & 105 - 110 & 110 - 115 No. of children & 3 & 4 & 7 & 7 & 15 & 9 & 6 & 6 & 3 \end{matrix}$

Q. 9.Find the mean, variance and standard deviation using short-cut methodHeight 70-75 75-80 80-85 85-90 90-95 95-100 100-105 105-110 110-115in cmsNo. of 3 4 7 7children15 96

Find the mean, variance and standard deviation using the short cut method

$\begin{matrix} H e i g h t i n c m & N o . o f c h i l d r e n 70 - 75 & 3 75 - 80 & 4 80 - 85 & 7 85 - 90 & 7 90 - 95 & 15 95 - 100 & 9 100 - 105 & 6 105 - 110 & 6 110 - 115 & 3 \end{matrix}$

The weights of 50 apples were recorded as given below. Calculate the mean weight, to the nearest gram by step deviation method.

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