Question
Intensity of Sound is measured in
________Solution
Decibels represent the ratio of sound pressure to a reference level, and are a logarithmic unit. This means that a 10 dB increase represents a tenfold increase in intensity.Â
The mean deviation and coefficient of mean deviation of 5 observation are 1.2 and 0.4. If the sum of the first four terms is 10, then the fifth term is...
For ANOVA table
the F - statistics is:
If the third quartile of the following data set 7,10,7,8,9 is 9.5, then the value of quartile deviation is:
With reference to index numbers, which of the following statements is true?
For a random variable x, the central moments (µi) of all order exist. The square of (2j + 1)th  moment (µ22j+1) is
The arithmetic mean of the following frequency distribution of number of accidents X on week working days is:
X:               �...
For frequency distribution presentation , which option is wrong.
Which of the following methods is NOT used in computation of a seasonal index for time series?
Which of the following satisfies the time and factor reversal test?