7 c] In a test on 2000 electric bulbs, it was found that the life of a particular make wasnormally distributed with an average life of 2040 hours and Standard…
8 c] In a normal distribution 31% of the items are under 45 and 8% of the items are over Find the mean and S.D of the distribution.
1 c] Give direct proof and proof by contradiction for the statement “If n is an odd integer then n+9 is an even integer”
Calculate the coefficient of correlation and obtain the lines of regression for the following data: x 1 2 3 4 5 6 7 8 9 y 9 8 10 12…
For any two odd integers m and n, show that i) m + n is even ii) mn is odd Answer:-
Define Null Hypothesis, Confidence intervals, Type-I and Type-II errors Null Hypothesis The Hypothesis was formulated for rejection under the assumption that it is true. Null Hypothesis is denoted by Ho…
The nine items of a sample have the following values: 45, 47, 50, 52, 48, 47, 49, 53,51. Does the mean of these differ significantly from the assumed mean of…
A sample of 100 students is taken from a large population. The mean height of the students in this sample is 160 cm. Can it be reasonably regarded that in…
In experiments on pea breeding, the following frequencies of seeds were obtained Theory predicts that the frequencies should be in proportions 9:3:3:1. Examine the correspondence between theory and experiment Round…
X and Y are independent random variables. X takes values 2, 5, and 7 with probability 1/2, 1/4, and 1/4 respectively. Y take values 3, 4, and 5 with the…
