McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Master of Commerce (M.com) , Bachelor of Commerce (B Com) .
| 51. |
If r = 1, the angle between the two regression lines is......................... |
| A. | Ninety degree |
| B. | Thirty degree |
| C. | Zero degree |
| D. | Sixty degree |
| Answer» C. Zero degree | |
| 52. |
If r = 0, the two regression lines are: |
| A. | Coincident |
| B. | Parallel |
| C. | Perpendicular to each other |
| D. | None of these |
| Answer» C. Perpendicular to each other | |
| 53. |
If bxy and byx are two regression coefficients, they have: |
| A. | Same signs |
| B. | Opposite signs |
| C. | Either a or b |
| D. | None of the above. |
| Answer» A. Same signs | |
| 54. |
If byx > 1, then bxy is: |
| A. | Greater than one |
| B. | Less than one |
| C. | Equal to one |
| D. | Equal to zero |
| Answer» B. Less than one | |
| 55. |
If X and Y are independent, the value of byx is equal to ........................ |
| A. | Zero |
| B. | One |
| C. | Infinity |
| D. | Any positive value |
| Answer» A. Zero | |
| 56. |
The property that both the regression coefficients and correlation coefficient have same signs is called................................ |
| A. | Fundamental property |
| B. | Magnitude property |
| C. | Signature property |
| D. | None of these |
| Answer» C. Signature property | |
| 57. |
The property that byx > 1 implies that bxy < 1 is known as ..................... |
| A. | Fundamental property |
| B. | Magnitude property |
| C. | Signature property |
| D. | None of these |
| Answer» B. Magnitude property | |
| 58. |
If X and Y are independent, the property byx = bxy = 0 is called ................... |
| A. | Fundamental property |
| B. | Magnitude property |
| C. | Mean property |
| D. | Independence property |
| Answer» D. Independence property | |
| 59. |
The Correlation coefficient between two variables is the ........................... of their regression coefficients. |
| A. | Arithmetic mean |
| B. | Geometric mean |
| C. | Harmonic mean |
| D. | None of these |
| Answer» B. Geometric mean | |
| 60. |
If the correlation coefficient between two variables, X and Y, is negative, then the regression coefficient of Y on X is............................. |
| A. | Positive |
| B. | Negative |
| C. | Not certain |
| D. | None of these |
| Answer» B. Negative | |
| 61. |
The G M of two regression coefficients byx and bxy is equal to .......................... |
| A. | R |
| B. | r2 |
| C. | 1 – r2 |
| D. | None of these |
| Answer» A. R | |
| 62. |
If one regression coefficient is negative, the other is ............................... |
| A. | 0 |
| B. | – ve |
| C. | +ve |
| D. | Either a or b |
| Answer» B. – ve | |
| 63. |
Arithmetic mean of the two regression coefficients is: |
| A. | Equal to correlation coefficient |
| B. | Greater than correlation coefficient |
| C. | Less than correlation coefficient |
| D. | Equal to or greater than correlation coefficient |
| Answer» B. Greater than correlation coefficient | |
| 64. |
byx is the regression coefficient of the regression equation..................... |
| A. | Y on X |
| B. | X on Y |
| C. | Either a or b |
| D. | None of these |
| Answer» A. Y on X | |
| 65. |
bxy is the regression coefficient of the regression equation..................... |
| A. | Y on X |
| B. | X on Y |
| C. | Either a or b |
| D. | None of these |
| Answer» B. X on Y | |
| 66. |
In ..................... regression analysis, only one independent variable is used to explain the dependent variable. |
| A. | Multiple |
| B. | Non-linear |
| C. | Linear |
| D. | None of these |
| Answer» C. Linear | |
| 67. |
The regression coefficient and correlation coefficient of the two variables will be the same if their .............................are same. |
| A. | Arithmetic mean |
| B. | Standard deviation |
| C. | Geometric mean |
| D. | Mean deviation |
| Answer» B. Standard deviation | |
| 68. |
The idea of testing of hypothesis was first set forth by .......................... |
| A. | R A Fisher |
| B. | J Neyman |
| C. | E L Lehman |
| D. | A Wald |
| Answer» B. J Neyman | |
| 69. |
By testing of hypothesis, we mean: |
| A. | A significant procedure in Statistics |
| B. | A method of making a significant statement |
| C. | A rule for accepting or rejecting hypothesis |
| D. | A significant estimation of a problem. |
| Answer» C. A rule for accepting or rejecting hypothesis | |
| 70. |
Testing of hypothesis and ......................are the two branches of statistical inference. |
| A. | Statistical analysis |
| B. | Probability |
| C. | Correlation analysis |
| D. | Estimation |
| Answer» D. Estimation | |
| 71. |
......................... is the original hypothesis |
| A. | Null hypothesis |
| B. | Alternative hypothesis |
| C. | Either a or b |
| D. | None of these |
| Answer» A. Null hypothesis | |
| 72. |
A null hypothesis is denoted by........................... |
| A. | H0 |
| B. | H1 |
| C. | NH |
| D. | None of these |
| Answer» A. H0 | |
| 73. |
An alternative hypothesis is denoted by........................... |
| A. | H0 |
| B. | H1 |
| C. | AH |
| D. | None of these |
| Answer» B. H1 | |
| 74. |
Whether a test is one sided or two sided, depends on........................ |
| A. | Simple hypothesis |
| B. | Composite hypothesis |
| C. | Null hypothesis |
| D. | Alternative hypothesis |
| Answer» D. Alternative hypothesis | |
| 75. |
A wrong decision about null hypothesis leads to: |
| A. | One kind of error |
| B. | Two kinds of errors |
| C. | Three kinds of errors |
| D. | Four kinds of errors |
| Answer» B. Two kinds of errors | |
| 76. |
Power of a test is related to ........................ |
| A. | Type I error |
| B. | Type II error |
| C. | Both a and b |
| D. | None of these |
| Answer» B. Type II error | |
| 77. |
Level of significance is the probability of................................ |
| A. | Type I error |
| B. | Type II error |
| C. | Both a and b |
| D. | None of these |
| Answer» A. Type I error | |
| 78. |
Which type of error is more severe error: |
| A. | Type I error |
| B. | Type II error |
| C. | Both a and b |
| D. | None of these |
| Answer» B. Type II error | |
| 79. |
Type II error means.............................. |
| A. | Accepting a true hypothesis |
| B. | Rejecting a true hypothesis |
| C. | Accepting a wrong hypothesis |
| D. | Rejecting a wrong hypothesis |
| Answer» C. Accepting a wrong hypothesis | |
| 80. |
Type I error is denoted by........................... |
| A. | Alpha |
| B. | Beta |
| C. | Gamma |
| D. | None of these |
| Answer» A. Alpha | |
| 81. |
Type II error is denoted by.................................... |
| A. | Alpha |
| B. | Beta |
| C. | Gamma |
| D. | None of these |
| Answer» B. Beta | |
| 82. |
The level of probability of accepting a true null hypothesis is called........................ |
| A. | Degree of freedom |
| B. | Level of significance |
| C. | Level of confidence |
| D. | D, |
| Answer» C. Level of confidence | |
| 83. |
The probability of rejecting a true null hypothesis is called....................... |
| A. | Degree of freedom |
| B. | Level of significance |
| C. | Level of confidence |
| D. | None of these |
| Answer» B. Level of significance | |
| 84. |
1 – Level of confidence =............................. |
| A. | Level of significance |
| B. | Degree of freedom |
| C. | Either a or b |
| D. | None of these |
| Answer» A. Level of significance | |
| 85. |
While testing a hypothesis, if level of significance is not mentioned, we take ................... level of significance. |
| A. | 1% |
| B. | 2% |
| C. | 5% |
| D. | 10% |
| Answer» C. 5% | |
| 86. |
...............refers to the number of independent observations which is obtained by subtracting the number of constraints from the total number of observations. |
| A. | Sample size |
| B. | Degree of freedom |
| C. | Level of significance |
| D. | Level of confidence |
| Answer» B. Degree of freedom | |
| 87. |
Total number of observations – number of constraints =...................... |
| A. | Level of significance |
| B. | Degree of freedom |
| C. | Level of confidence |
| D. | Sample size |
| Answer» B. Degree of freedom | |
| 88. |
Accepting a null hypothesis when it is false is called................................ |
| A. | Type I error |
| B. | Type II error |
| C. | Probable error |
| D. | Standard error |
| Answer» B. Type II error | |
| 89. |
Accepting a null hypothesis when it is true is called................................ |
| A. | Type I error |
| B. | Type II error |
| C. | Probable error |
| D. | No error |
| Answer» D. No error | |
| 90. |
When sample is small,....................... test is applied. |
| A. | t-test |
| B. | Z test |
| C. | F test |
| D. | None of these |
| Answer» A. t-test | |
| 91. |
To test a hypothesis about proportions of items in a class, the usual test is.............. |
| A. | t-test |
| B. | Z- test |
| C. | F test |
| D. | Sign test |
| Answer» B. Z- test | |
| 92. |
Student’s t-test is applicable when: |
| A. | The values of the variate are independent |
| B. | The variable is distributed normally |
| C. | The sample is small |
| D. | All the above |
| Answer» D. All the above | |
| 93. |
Testing of hypotheses Ho : μ = 45 vs. H1 : μ > 45 when the population standard deviation is known, the appropriate test is: |
| A. | t-test |
| B. | Z test |
| C. | Chi-square test |
| D. | F test |
| Answer» B. Z test | |
| 94. |
Testing of hypotheses Ho : μ = 85 vs. H1 : μ > 85, is a ...................test. |
| A. | One sided left tailed test |
| B. | One sided right tailed test |
| C. | Two tailed test |
| D. | None of these |
| Answer» B. One sided right tailed test | |
| 95. |
Testing of hypotheses Ho : μ = 65 vs. H1 : μ < 65, is a ...................test. |
| A. | One sided left tailed test |
| B. | One sided right tailed test |
| C. | Two tailed test |
| D. | None of these |
| Answer» A. One sided left tailed test | |
| 96. |
Testing of hypotheses Ho : μ = 65 vs. H1 : μ ≠ 65, is a ...................test. |
| A. | One sided left tailed test |
| B. | One sided right tailed test |
| C. | Two tailed test |
| D. | None of these |
| Answer» C. Two tailed test | |
| 97. |
Student’s t-test was designed by ............................ |
| A. | R A Fisher |
| B. | Wilcoxon |
| C. | Wald wolfowitz |
| D. | W S Gosset |
| Answer» D. W S Gosset | |
| 98. |
Z test was designed by ........................................ |
| A. | R A Fisher |
| B. | Wilcoxon |
| C. | Wald wolfowitz |
| D. | W S Gosset |
| Answer» A. R A Fisher | |
| 99. |
Z test was designed by ....................................... |
| A. | R A Fisher |
| B. | Wilcoxon |
| C. | Wald wolfowitz |
| D. | W S Gosset |
| Answer» A. R A Fisher | |
| 100. |
The range of F ratio is ........................................ |
| A. | – 1 to + 1 |
| B. | – ∞ to ∞ |
| C. | 0 to ∞ |
| D. | 0 to 1 |
| Answer» C. 0 to ∞ | |
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