Question
What is the law of
reflection?Solution
The law of reflection states that the angle at which light hits a surface (incidence) is equal to the angle at which it reflects off.
For the two variables X and Y, the following observations are tabulated
X:           3             4        �...
Two data set of size 9 and 6 have standard deviation 3 and 4 respectively and arithmetic means 3 and 3 respectively. The standard deviation of combined...
From standard pack of 52 cards, 3 cards are drawn at random without replacement. The probability of drawing a king, a queen and a jack in order is
For ANOVA table
the F - statistics is:
A physical instructor claims that the mean weight of students in school is greater than 82 kg with standard deviation 20. If a sample of size 81 studen...
Which of the following satisfies the time and factor reversal test?
For a distribution, the mean is 10, variance is 16, Y1 is +1 and β2 is 4. The distribution is:
With reference to index numbers, which of the following statements is true?
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...
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...
