Differentiate between primary data and secondary data

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Reference no: EM132152841

Statistics Assignment -

Attempt all the questions.

1. What is sampling? Explain various methods of sampling?

2. Differentiate between primary data and secondary data. Describe the factors that affect the choice of data to be in investigations.

3. (a) Find the missing frequency from the following data.

Marks	0-10	10-20	20-30	30-40	40-50	50-60
No. of students	15	25	30	-	30	20

(b) Calculate mode from the data given below:

Profit (Rs. In Lakh)	0-5	5-10	10-20	20-30	30-50
No of Companies	2	3	8	9	10

4. Calculate mean and standard deviation from the following distribution:

Class Interval	10-20	20-30	30-40	40-50	50-60	60-70	70-80
Frequency	2	4	4	8	6	3	2

5. Write short note on the following.

(a) Skewness

(b) Sampling and Non sampling

(d) Schedule and questionnaire

Reference no: EM132152841

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