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Q. If each observation of the data is increased by 5, then what happens to its mean?

Q. For a symmetrical distribution Q1=25, Q3=45, the median is

Q. The rank correlation coefficient of a debating contest involving 10 participants was calculated as 0.6. However, it was later discovered that the difference in the ranks of some participants was read as 8 instead of 3. Find the correct correlation coefficient:

Q. Index number for base year is always considered as------

Q. Secular trend can be measured by:

Q. For a symmetrical distribution:

Q. If the maximum value in a series is 25 and its range is 15, the maximum value of the series is:

Q. What is the value of the first quartile for observations 15, 18, 10, 20, 23, 28, 12, 16?

Q. The following numbers represent the ages of people on a bus: 3, 6, 27, 13, 6, 8, 12, 20, 5, 10. Calculate their mean of their ages.

Q. For the recorded observation, the ratios measured by absolute variation are considered as