The following data is given Age (in years): Below 10, below20, below30, below40,below50, below60, below70, below 80 and No. of persons: 2,5,9,12,14,15,15.5,15.6 Find mean , median and mod
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A company has three establishments A,B and C in three cities. Analysis of the daily wages paid to the employees in the three establishments is given below: Establishments: A B C Number of employees: 20 25 40 Average daily wages: 305 300 340 Standard Deviation: 50 40 45 Find the average and standard deviation of the wages ...
In a sample of 1000 cases, the mean of a certain test is 14 and S.D is 2.5. Assuming the distribution to be normal, find (1) how many students score between 12 and 15? (2) How many score above 18? (3) how many ...
In FOUR tossed of a coin , let x be the number of heads. calculate the expected values of x.
In a Bolt factory, machines A, B and C manufacture respectively 25%, 35% and 40% . Of the total of their outputs 5,4 and 2 % are defective bolts. A bolt is drawn at random from the product and is ...
A company has three establishments A,B and C in three cities. Analysis of the daily wages paid to the employees in the three establishments is given below: Establishments: A B C Number of employees: 20 25 40 Average daily wages: 305 300 340 Standard Deviation: 50 40 45 Find the average and standard deviation of the wages ...