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- The t-Distribution is ……………. Spread out then the standard normal Distribution.
a. Less b. More c. Equally d. Not
- To find the confidence internal for the ratio of two variances we use:
a. F-Distribution b. Z-Distribution c. Chi-Square Distribution d. T-Distribution
- How many percent of values are less then 4th^ deciles in a symmetric distribution.
a. 14 b. 24 c. 4 d. 40
- The combined distribution of more than two random variables is:
a. Bivariate Distribution b. Marginal Distribution c. Joint Distribution d. Univariate Distribution
- The degrees of freedom for a T-test with sample size 14 is:
a. 14 b. 13 c. 7 is not sure d. 0
- Which of the falling is true for the binomial distribution b(x: n, p):
a. Mean > Variance b. Mean > Variance c. Mean = Variance d. Mean = Standard Deviation
- What is f^ m in the formula of mode?
a. first frequency b. last frequency c. middle frequency d. highest frequency
Question No. 2
Write the two types of experimental designs? 2Marks
Question No. 3
Write down the formula for calculating the confidence interval for the mean of population (where population standard deviation is known) 2 Marks
Mileage No of classes Class Boundaries 30.0-----------32.9 2 29.95-----------32. 33.0-----------35.9 4 32.95-----------35. 36.0-----------38.9 14 35.95-----------38. 39.0-----------41.9 8 38.95-----------41. 42.0-----------44.9 2 41.95-----------44.
(1) What is the value of lower class Boundaries in the third group? (2) What is the number of class whose mileage is more than 30? (3) How many cars have the mileage more than 42.0? 3 Marks
Question No. 10
A random sample of 12 observations is drawn from a normal distribution σ 2 = 33. Suppose that the sample mean is found to be^ X = 19 Find 96 % confidence interval for^ μ^. 5 Marks
Question No. 11
If we have (^) X = 15 and
10 2 1 1 1
( X X ) 56
−
∑ −^ = Then find the 96 % confidence
interval for population variance ( σ^2 ). 5 Marks
Find the fitted regression line and the data from which it is computed is given below Y = 0.5 + 0.5 X Y^2 ∑ = 26,^ ∑ Y = 10,^ ∑ XY = 37, n = 5 Find Standard error estimated = Sy x^. 5 Marks
Question No. 13
^ ( (^) P )
No of samples ^ f ( (^) P ) 0 1 1/ 1/3 9 9/ 2/3 9 9/ 1 1 1/ 20
Compute the Mean Compute the Variance 5 Marks
