For a group of 200 candidates, the mean and the standard deviation of scores were found to be 40 and 15, respectively. Later on it was discovered that the scores of 43 and 35 were misread as 34 and 53, respectively. Find the correct mean and the standard deviation.

For a group of 200 candidates, the mean and standard deviation were found to be 40 and 15, respectively. Later on, it was found that the score 43 was misread as 34. Find the correct mean and correct standard deviation.

Q. The mean of a numerical data set is

¯ ¯ ¯ x

and the standard deviation is S. if a number P is added to each term in the data set then the mean and standard deviation become.

Q. The class mean score on a test was

60

, and the standard deviation was

15

. lf Elena's score was within

2

standard deviations of the mean, what is the lowest score she could have received?

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A researcher computed the mean, the median, and the standard deviation for a set of performance scores. If 5 were to be added to each score, which of these three statistics would change?

The correct option is E The mean and the medianIf 5 were added to each score, the mean would go up by 5, as would the median. However, the spread of the values would remain the same, simply centered around a new value. So, the standard deviation would NOT changeThe correct answer is D.

A researcher computed the mean, the median, and the standard deviation for a set of performance scores. If $5$ were to be added to each score, which of these three statistics would change?

The correct option is E The mean and the median
If $5$ were added to each score, the mean would go up by $5$ , as would the median. However, the spread of the values would remain the same, simply centered around a new value. So, the standard deviation would NOT change
The correct answer is D.