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In the sentence something has been done to prove a certain point, hence, for that most probably an experiment might have been conducted. Hence, ‘demonstrated’ is correct as it means ‘to present something’ using practical methods.
The purchasing power of money is equal to:
For the following frequency distribution
Class : 3-5 5-7 7-9 ...
For a group of 100 students, the mean and standard deviation of scores were found to be 30 and 5 respectively. Later on it was discovered that the scor...
Which option is WRONG?
The following observations 14, 19, 17, 20, 25 constitute a random sample from an unknown population with mean u and standard deviation σ.
The...
The grouped data for the observations are
Class: 1-3 3-5 5-7
The Excess Kurtosis of the Geometric distribution with parameter p is:
If xi | fi , i = 1,2,...n is a frequency distribution with standard deviation 15 and mean 30, the coefficient of variation will be equal to: