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Standard deviation is the square root of:
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Standard deviation is the square root of:
The median of 1, 3, 5, 7, 9 is:
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If all observations are equal, their variance is:
The arithmetic mean of 2, 4, 6, 8 is:
If the average of 5 students is given and one student leaves, how is the new average calculated?
The average of 5, 10, 15, and x is 20. What is the value of x?
Mean of 5 numbers is 18. Four numbers are 16, 18, 14, and 22. The 5th number is:
The average of 3 numbers is 26. If the first number is 16 and the second is 31, the third number is:
If 8 persons have an average of 12.5 and one person of 18 kg is replaced with 10 kg, the new average will be:
The numbers 7, 6, 10, 8, and 9 have frequencies 2, 2, 5, 1, and 2. Find their mean.
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