Fill in the blanks with a suitable word as given in the brackets: When the errors are in one direction,they are called errors. (unbiased/biased)

(ii) A variable is one which can take only isolated values. (continuous/ discrete)

(iii) Division of data on the basis of similarities and resemblances is termed as (classification/tabulation)

(iv) Title given to a row in a statistical table is named as . (caption/stub) In a histogram, the time is taken on axis.

(vi) is called a positional average. (mean/median)

(vii) is used to denote the degree of heterogeneity in the data. (Skewness Dispersion)

(viii) of a Logarithm is always positive. (Mantissa/Characteristic) Distinguish between primary data and secondary data.

2.(a) Explain the observation method and personal interview method of collection of data and also narrate their merits. Briefly explain a variable and an attribute with an appropriate example of each.

3. From the following data, state which series is more variable. <img src='./qimages/11604-3.jpg'> Draw a range graph for the following data: <img src='./qimages/11604-4a.jpg'> Write the importance of graphic presentation of statistical data.

5.(a) Calculate median from the data given below: <img src='./qimages/11604-5a.jpg'> Prove the following property of Arithmetic mean with the help of an illustration: <img src='./qimages/11604-5b.jpg'>

6. Differentiate between census method of enquiry and sampling method of enquiry. Briefly explain various probability sampling methods.

7.(a) Find the Geometric mean from the following data 156, 68, 2158, 332, 542.
What are the uses and limitations of Harmonic mean