41. Central statistical organization was established:
42. Which one of these sampling methods is a probability method that seems to be objective, accurate and unbiased?
43. Assertion (A): If regression coefficient of X on Y is greater than one, regression coefficient of Y on X must be less than one.
Reason (R): The geometric mean between two regression coefficients is the co-efficient of correlation.
On the basis of the above, choose the appropriate answer :
Reason (R): The geometric mean between two regression coefficients is the co-efficient of correlation.
On the basis of the above, choose the appropriate answer :
44. In the case of classification of data, the class having its upper limit is treated as the lower limit of its next class is called
45. Which of the following statements relating to the sampling theory are correct?
1. The values of the statistical measures based on the sampled units are called values of statistics.
2. In the simple random sampling technique, the element of the population and the unit of the sample are different.
3. Snow-ball sampling technique is a probability based sampling technique.
4. The 'law of statistical regularity' and the 'law of inertia of large numbers' are the main bases of the sample to become representative of the population.
Choose the correct answer:
1. The values of the statistical measures based on the sampled units are called values of statistics.
2. In the simple random sampling technique, the element of the population and the unit of the sample are different.
3. Snow-ball sampling technique is a probability based sampling technique.
4. The 'law of statistical regularity' and the 'law of inertia of large numbers' are the main bases of the sample to become representative of the population.
Choose the correct answer:
46. If a perpendicular on X-axis from the point of intersection of both 'less than' and 'more than' frequency curves is drawn, it gives the value of
47. Match the items of List-I with the items of List-II and select the correct answer:
List-I
List-II
a. Standard error of mean
1. $$Ha:{\mu _1} \ne {\mu _2}$$
b. Base of point estimate of the mean of the population
2. Values based on all the observations of the population
c. Non-specific hypothesis
3. Mean of the sampling distribution of mean
d. Parameter value of descriptive statistics
4. Standard deviation of the sampling distribution of mean
| List-I | List-II |
| a. Standard error of mean | 1. $$Ha:{\mu _1} \ne {\mu _2}$$ |
| b. Base of point estimate of the mean of the population | 2. Values based on all the observations of the population |
| c. Non-specific hypothesis | 3. Mean of the sampling distribution of mean |
| d. Parameter value of descriptive statistics | 4. Standard deviation of the sampling distribution of mean |
48. If the value of coefficient of determination is 0.64, what is the value of coefficient of correlation?
49. To study the economic condition of the workers of a factory, universe will be
50. Sampling distribution of mean is very close to the standard normal distribution when
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