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प्रश्न
The mean of a set of numbers is `bar(X)`. If each number is multiplied by z, the mean is
विकल्प
`bar(X) + z`
`bar(X) - z`
`zbar(X)`
`bar(X)`
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उत्तर
`zbar(X)`
Explanation;
Hint:
If each observation is multiplied by k, k ≠ 0 then the arithmetic mean is also multiplied by the same quantity.
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संबंधित प्रश्न
Following table shows the points of each player scored in four games:
| Player | Game 1 | Game 2 | Game 3 | Game 4 |
| A | 14 | 16 | 10 | 10 |
| B | 0 | 8 | 6 | 4 |
| C | 8 | 11 | Did not play | 13 |
Now answer the following questions:
- Find the mean to determine A’s average number of points scored per game.
- To find the mean number of points per game for C, would you divide the total points by 3 or by 4? Why?
- B played in all the four games. How would you find the mean?
- Who is the best performer?
Solve any two of the following.
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| Frequency | 6 | 4 | 5 | 7 | 3 |
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