The mean of 100 observations was calculated as 69. It was found later on that one of the observations was misread as 92 instead of 67. The correct mean is: Options :69.2568.2567.75none of these

The correct mean can be calculated using the following steps:

1. First, calculate the total sum of the 100 observations. Since the mean was initially calculated as 69, the total sum would be 69 * 100 = 6900.

2. Then, subtract the incorrect observation from the total sum. The incorrect observation was 92, so the corrected total sum would be 6900 - 92 = 6808.

3. Add the correct observation to the corrected total sum. The correct observation was 67, so the final total sum would be 6808 + 67 = 6875.

4. Finally, calculate the correct mean by dividing the final total sum by the total number of observations. The correct mean would be 6875 / 100 = 68.75.

So, the correct mean is 68.75.

The correct mean can be calculated by following these steps:

1. First, calculate the total sum of the 100 observations. Since the mean was initially calculated as 69, the total sum would be 69 * 100 = 6900.

2. Then, subtract the incorrect observation from the total sum. The incorrect observation was 92, so the corrected total sum would be 6900 - 92 = 6808.

3. Add the correct observation to the corrected total sum. The correct observation was 67, so the final total sum would be 6808 + 67 = 6875.

4. Finally, calculate the correct mean by dividing the final total sum by the number of observations. The correct mean would be 6875 / 100 = 68.75.

So, the correct mean is 68.75.