From the following information, tell us which type of air conditioner you will prefer to buy and why? (Find out with the help of arithmetic mean).
Consumers Awareness about air-conditioners
(in percentage)
|
Awareness |
Name of the Companies |
|||||
|
Videocon |
National |
Samsung |
L.G. |
Voltas |
Others |
|
|
Brand |
14 |
10 |
20 |
18 |
8 |
9 |
|
Price |
25 |
5 |
12 |
28 |
19 |
5 |
|
After sale service |
18 |
6 |
17 |
21 |
12 |
8 |
|
Technology |
22 |
8 |
12 |
17 |
14 |
10 |
Calculation of Arithmetic Mean:
Consumer Awareness about air-conditioners
|
Awareness |
Name of the Companies |
|||||
|
Videocon |
National |
Samsung |
L.G. |
Voltas |
Others |
|
|
Brand |
24 |
10 |
20 |
18 |
8 |
9 |
|
Price |
25 |
5 |
12 |
28 |
9 |
5 |
|
After sale service |
18 |
6 |
17 |
21 |
12 |
8 |
|
Technology |
22 |
8 |
12 |
17 |
14 |
10 |
|
ΣX |
89 |
29 |
61 |
84 |
43 |
32 |
|
|
22.25% |
7.25% |
15.25% |
21% |
10.75% |
8.50% |
Write down the essential qualities of a good questionnaire.
Essentials of a good questionnaire:Following are the essentials of a good questionnaire:
1. Limited number of questions:The number of questions should be limited as far as possible. Normally fifteen to twenty questions are sufficient enough for making the required enquiry.
2. Simplicity:The language of the questions should be simple and easily understandable. It should be clear and not vague. It should not convey two meanings.
3. Logically arranged:The questions should be arranged logically. Ther should be a proper sequence of the questions.
4. Related to the points:Questions should be related to the point. They should not be irrelevant.
5. Avoiding personal questions:Personal questions should be avoided as far as possible. For example, questions about income, volume of sales etc. should not be asked.
Show the following data with the help of a bar-diagram. Through which media do the people know about the product?
Median Influence
|
Advertisement |
Families influenced |
|
Television |
47 |
|
Newspaper |
30 |
|
Magazines |
20 |
|
Cinema |
25 |
|
Sales representative |
15 |
|
Exhibits - Stall |
10 |
|
Radio |
18 |
Observation : Majority of people came to know about the product either through television or through newspaper.
Differentiate between Primary Data and Secondary Data.
Differences between Primary Data and Secondary Data:
|
Basis of Difference |
Primary Data |
Secondary Data |
|
1. Definition |
1. They are collected for the first time. |
1. They have already been collected by some other persons. |
|
2. Accuracy |
2. They are accurate. |
2. They lack accuracy. |
|
3. Nature of Data |
3. They are in the form of raw data to which statistical methods are applied. |
3. They are in the form of finished products. |
|
4. Editing |
4. They do not require editing. |
4. They require editing. |
|
5. Time and money |
5. Collection of primary data requires a lot of time and money. |
5. They dp not require a lot of time and money. |
|
6. Precaution |
6. Precaution is not required in the use of primary data. |
6. Precautions are required in the use of secondary data. |
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