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प्रश्न
Choose the correct alternative.
Cov (x, y) = __________
पर्याय
`sum (x - bar x)(y - bar y)`
`(sum (x - bar x)(y - bar y))/"n"`
`(sum xy)/"n" - bar x bar y`
both `(sum (x - bar x)(y - bar y))/"n"` and `(sum xy)/"n" - bar x bar y`
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उत्तर
Cov (x, y) = `underline ("both" (sum (x - bar x)(y - bar y))/"n" and (sum xy)/"n" - bar x bar y)`
APPEARS IN
संबंधित प्रश्न
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| X | 59 | 60 | 61 | 62 | 63 |
| Y | 78 | 82 | 82 | 79 | 81 |
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