Statistics

Q.

Explain the scope of Statistics.

Q.

What are the advantages and disadvantages of standard deviation ?

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Why standard deviation is important?

Q.

What is PDS?

Q.

The causes of productivity of loss are to be written around a circle in an annual report. In how many ways can an analyst write them around the circle. Assume that the number of causes are $5$?

Q.

What are the Applications of Limits?

Q.

If the arithmetic of the data given below is 28, find (a) the missing frequency and (b) the median of the series

$\begin{array}{ccccccc}\text{Profit per Retail shop (in Rs)}& 0-10& 10-20& 20-30& 30-40& 40-50& 50-60\\ \text{Number of Retail shops}& 12& 18& 27& --& 17& 6\end{array}$

Q.

Give the formula for calculating the median of ungrouped data.

Q.

What is meant by direct personal investigation? Give its merit and demerits.

Q.

The following table gives production yield in kg per hectare of wheat of 150 farms in a village. Calculate the mean, median and mode production yield.

$\begin{array}{cccccccccc}\text{Production Yield}& 50-53& 53-56& 56-59& 59-62& 62-65& 65-68& 68-71& 71-74& 74-77\\ \left(kgperhectare\right)& & & & & & & & & \\ \text{Number of Farms}& 3& 8& 14& 30& 36& 28& 16& 10& 5\end{array}$

Q.

Calculate arithmetic mean using direct method.

$\begin{array}{cccccc}\text{Wages (in Rs)}& 10& 20& 30& 40& 50\\ \text{Number of workers}& 4& 5& 3& 2& 1\end{array}$

Q.

Calculate Lower Quartile and Upper Quartile from the following data :

$\begin{array}{ccccccccc}\text{X}& 0-10& 10-20& 20-30& 30-40& 40-50& 50-60& 60-70& 70-80\\ \text{f}& 15& 20& 25& 24& 12& 31& 71& 52\end{array}$

Q.

What is an economic problem why does it arise ?

Q.

What is the formula of net value added at factor cost?

Q.

Which measures of central tendency are affected by extremes?

Q.

Give the formula for finding out median of a continuous series.

Q.

Static Code Analysis Is Performed in the _____________

Q.

If the variance of $1,2,3,4,...,10$ is $\frac{99}{12}$, then the standard deviation of $3,6,9,12,...,30$ is

1. $\frac{297}{4}$

2. $\frac{3}{2}\sqrt{33}$

3. $\frac{3}{2}\sqrt{99}$

4. $\frac{\sqrt{99}}{12}$

5. $\frac{3\sqrt{3}}{2}$

Q.

What is a pilot survey? Explain its importance?

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What is the problem of choice?

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What Are the Benefits of the Price System?

Q.

A histogram is used for which type of data?

Q.

What is average utility?

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Following information pertains to the daily income of 150 families. Calculate the arithmetic mean.

$\begin{array}{cc}\text{Income (in Rs)}& \text{Number of Families}\\ \text{More than 75}& 150\\ \text{More than 85}& 140\\ \text{More than 95}& 115\\ \text{More than 105}& 95\\ \text{More than 115}& 70\\ \text{More than 125}& 60\\ \text{More than 135}& 40\\ \text{More than 145}& 25\end{array}$

Q.

Find the median of the following ungrouped data
1, 3, 9, 5, 3, 7, 9, 2, 6, 9, 5, 3

1. 3

2. 6

3. 5

4. 5.5

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Which quartile is equal to median?

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What is the difference between mean and standard deviation?

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Can the standard deviation ever be negative?

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Why is heisenbergs uncertainty principle insignificant for macroscopic objects?

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What Do You Mean By Composing Mail