In an experiment with 15 observations on x, then following results were available: Σ x² = 2830, Σ x = 170 One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is:

Statistics and Probability: JEE Main 2003 Mathematics question

JEE Main 2003 · Annual, Paper 1 · Q5419

JEE Main 2003Annual, Paper 1MathematicsMediumStatistics and Probability258× since 2002

In an experiment with 15 observations on

x

, then following results were available:

\sum {{x^2}} = 2830

\sum x = 170

One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :

JEE Main 2003 · Annual, Paper 1 · Q5419

JEE Main 2003Annual, Paper 1MathematicsMediumStatistics and Probability258× since 2002

In an experiment with 15 observations on

x

, then following results were available:

\sum {{x^2}} = 2830

\sum x = 170

One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :