Which one of the following statements is true

Which option is incorrect for the component of ti.me series.

For a distribution, mean is 40, median is 40.5 and mode is 41. The distribution is:

Which one is not basis of classification of data.

The value of k so that following is probability mass function

A Poisson distribution has a double mode at x = 1 and x = 2. The probability for x = 1 or for x = 2 of these two values is:

For the price -quantity chart

If the second and third moment about the origin are 8 and 18 and the third moment about mean is -14 , then the first moment about the origin is:

The purchasing power of money is equal to: