Which of the following relating to normal distribution are not correct?3 2
A. (i), (iii) and (vi)
B. (iii), (iv) and (v)
C. (i), (iii) and (v)
D. (i), (iii) and (iv)
Select an option to see the answer and solution.
If A is a perfect subset of B and P(a < Pb), then P(B - A) is equal to:
A. P(a)/P(b)
B. P(a) × P(b)
C. P(a) + P(b)
D. P(b) - P(a)
Select an option to see the answer and solution.
The income of 5 persons are as follows
Person Income per month (Rs.)
Ram
1,500
Shyam
1,700
Mohan
2,000
Aryan
5,000
Krishna
6,000
Types of above series . . . . . . . .
A. individual series
B. discrete series
C. continuous series
D. time series
Select an option to see the answer and solution.
Under binomial distribution, a random experiment performed repeatedly . . . . . . . . and . . . . . . . . number of times.
A. infinite, fixed
B. finite, fixed
C. infinite, variable
D. finite, variable
Select an option to see the answer and solution.
Classification of the students of a college in two categories 'rural' and 'urban' is called
A. Qualitative classification
B. Quantitative classification
C. Geographical classification
D. None of these
Select an option to see the answer and solution.
The correlation coefficient will have a positive sign when
A. X is increasing and Y is decreasing
B. Both X and Y are increasing
C. X is decreasing and Y is increasing
D. There is not change in the values of X and Y
Select an option to see the answer and solution.
In a moderately asymmetrical distribution, the mode and mean are 42 and 40, respectively. The median is
Select an option to see the answer and solution.
The coefficient of correlation:
A. is the square of the coefficient of determination
B. is the square root of the coefficient of determination
C. is the same as r-square
D. can never be negative
Select an option to see the answer and solution.
If the coefficient of determination is equal to 1, then the correlation coefficient:
A. must also be equal to 1
B. can be either -1 or +1
C. can be any value between -1 to +1
D. must be -1
Select an option to see the answer and solution.
Statistics means
A. Data only
B. Statistical method only
C. Both of the above
D. None of the above
Select an option to see the answer and solution.
Which of the following is studied in statistics?
A. Numerical facts
B. Qualitative facts
C. Both of the above
D. None of the above
Select an option to see the answer and solution.
Match the following.
List-I List-II
a. Positive correlation
1. When two or more variables are involved and they are to be studied in relation to their relationship with one another
b. Multiple correlation
2. When ratio of change between two variables is uniform
c. Linear correlation
3. When relationship of two variables is studied by eliminating the effect of other variables from both
d. Partial correlation
4. When movement of variables take place in same direction
A. a-4, b-1, c-2, d-3
B. a-1, b-2, c-3, d-4
C. a-3, b-2, c-4, d-1
D. a-2, b-3, c-1, d-4
Select an option to see the answer and solution.
There are 1000 people living in a colony in which the number of educated people is 450 and the number of employed people is 300. 160 out of employed people are educated. The number of uneducated unemployed in the colony is
Select an option to see the answer and solution.
Which of the following sampling methodology statements do you agree with?
A. Always choose the method most suited to the problem, irrespective of all other factors
B. The rarer the population, the larger the sample size should be
C. Sample size is more important than sample methodology
D. We should use probability method for the important business decision
Select an option to see the answer and solution.
The population mean μ is called:
A. Discrete variable
B. Continuous variable
C. Parameter
D. Sampling unit
Select an option to see the answer and solution.
Which statistical test should be applied to test the effectiveness of 'special coaching' on the marks scored by the students?
A. Paired f test
B. Chi-square test
C. Z-test
D. F test
Select an option to see the answer and solution.
Obtaining too many males in your sample would be an example of which of the following types of survey errors?
A. Measurement error
B. Coverage error
C. Sampling error
D. Non-response error
Select an option to see the answer and solution.
Probability of rejecting the null hypothesis when it is true, is called
A. type II error
B. type I error
C. standard error
D. None of these
Select an option to see the answer and solution.
Among the following, choose the most suitable 'test' that can be applied to examine the influence of one factor on different groups
A. 't' test
B. 'F' test
C. 'Chi-square' test
D. None of the above
Select an option to see the answer and solution.
With reference to dispersion, which of the following statement is/are correct?
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
Select an option to see the answer and solution.
