Standard Deviation of Ungrouped Data by Step Deviation Method

Q. The amount that the children have spend on buying stickers are 5, 10, 15, 20, 25. Find the standard deviation using step deviation method.

1. 7.07
2. 3.28
3. 8.08
4. 5.75

Q.

Find the standard deviation for the following data.

$\begin{array}{cccccc}{x}_i& 3& 8& 13& 18& 23\\ f_i& 7& 10& 15& 10& 6\end{array}$

Q.

Find the standard deviation for the following data.

$\begin{array}{cccccc}{x}_i& 3& 8& 13& 18& 23\\ f_i& 7& 10& 15& 10& 6\end{array}$

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Q. 48 students were asked to write the total number of hours per week they spent on watching television. With this information find the standard deviation of hours spent on watching television.

$\begin{array}{cccccccc}x& 6& 7& 8& 9& 10& 11& 12\\ f& 3& 6& 9& 13& 8& 5& 4\end{array}$

1. 1.6
2. 2.6
3. 3.2
4. 3.8

Q. The number of cars sold in 5 consecutive days are given as 11, 12, 10, 8, 9. Find it's standard deviation using mean method.

1. 1.41
2. 3.23
3. 5.26
4. 6.45

Q. The number of coins collected by Ram on 5 consecutive days are 2, 4, 6, 8, 10. Find the standard deviation using step deviation method.

1. 2.42
2. 3.45
3. 3.89
4. 4.25

Q. Find the standard deviation for the following data:
$\begin{array}{cccccc}{x}_i& 3& 8& 13& 18& 23\\ f_i& 7& 10& 15& 10& 6\end{array}$

1. 5.37
2. 15.92
3. 6.12
4. 13.87

Q.

The number of orders received by food delivery app for 7 consecutive days is as follows.

16, 20, 40, 50, 30, 60, 40, 80.

Find the standard deviation about the mean.

1. 19.82

2. 19.50

3. 19.60

4. 19.73

Q.

Find the standard deviation for the following data.

$\begin{array}{cccccc}{x}_i& 3& 8& 13& 18& 23\\ f_i& 7& 10& 15& 10& 6\end{array}$

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