Question
The average working hours per month of the staff aged over 50 years in a factory were 160 and that of the staff aged under 50 years were 210. The mean working hour per month of all the staff was 200. The ratio of the number of the staff aged over 50 to that of the staff aged under 50 is:
More Welfare Economics Questions
- Which of the following is an example of using a sample to make inference about a population?
- A random sample of 100 ball bearings selected from a shipment of 2000 ball bearing has an average diameter of 0.354 inches with standard deviation 0.048 in...
- The mode (correct to two decimal places) for the given data is:
- Which one is not non-probability sample method
- For the discrete distribution, the Pearson's coefficient of skewness β2 is always:
- For the recorded observation, the coefficient of variation is 0.2 and the variance is 16. The arithmetic mean is:
- The mean and median of the distribution are 10 and 11 respectively, then the mode equals to
- Two random variables X and Y are said to be independent if:
- The six decile (D6 ) of 5, 3, 2, 6, 8, 4 is:
- For the frequency distribution of X number of grammatical mistakes per line is as follows. X: 0 2 4 P(x): 0.5 ...
Hey! Ask a query
Please enter email id
The email must be a valid email address.
Please enter Mobile Number
Please enter valid Mobile Number
Please enter your Doubt
