Biostatistics And Research Methodology-BP801TT PDF

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Biostatistics and Research Methodology (BP801TT)

Multiple Choice Questions Biostatistics and Research Methodology (BP801TT)

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Biostatistics and Research Methodology (BP801TT) 1.a : Introduction to Statistics and Biostatistics 1. According to Crexton and Cowden which arrangement of component of statistics is true? a. Collection of data - Analysis of data - Presentation of data - Interpretation of data b. Collection of data - Presentation of data - Analysis of data - Interpretation of data c. Presentation of data - Analysis of data - Interpretation of data – Collection of data d. Interpretation of data - Collection of data - Presentation of data - Analysis of data Ans: b 2. Which is not step of Descriptive Statistics? a. Collecting b. Organizing c. Hypothesis testing d. Presenting Data e. Summarizing Ans: c 1.b : Introduction to Statistics and Biostatistics 3. Which is related to Frequency Distribution? a. Tally Mark b. Variable c. Frequency d. Class Interval e. All of above f. Option a and b g. Option c and d Ans: e 4. If Class intervals are not given, then it is called as a a. Discrete Frequency Distribution b. Continuous Frequency Distribution c. Grouped Frequency Distribution d. None of above Ans: a

.

5. Types of Class intervals are a. Exclusive b. Discrete c. Inclusive d. Continuous e. Option a and c f. Option b and d g. Option a and b h. Option c and d Ans: e Page 2

Biostatistics and Research Methodology (BP801TT) 1.c : Graphical Presentation of Frequency Distribution 6. Age and Salary are Continuous variables. True or False? a. True b. False Ans: a

7. a. Line frequency Graph b. Histogram c. Frequency polygon d. Ogive e. Frequency Curve Ans: c

8. a. Histogram b. Frequency polygon c. Ogive d. Frequency Curve Ans: c

Figure indicates which type of Graph?

Figure indicated which type of graph?

9. Cumulative Frequency curve also known as a. Histogram b. Frequency Polygon c. Grouped Frequency d. Line frequency curve e. Ogive Ans: e Page 3

Biostatistics and Research Methodology (BP801TT) 1.d : Measure of Central Tendency 10. Mean is also known as a. Median b. Mode c. Average d. Range Ans: c 11. Which is Positional central tendency? a. Arithmetic Mean b. Geometric Mean c. Harmonic Mean d. Median e. All of above Ans: d 12. Which is NOT mathematical central tendency? a. Arithmetic Mean b. Median c. Harmonic Mean d. Geometric Mean Ans: b 13. Simple arithmetic mean of 2, 8, 7, 3, 4.2, 6.1, 8.2, 7.1, 10, 9 is a. 4.64 b. 7.46 c. 8.64 d. 6.46 Ans: d 14. Which of the following is a equation to derive arithmetic mean in grouped data by short cut method.

a.

b.

c. Ans: a

d.

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Biostatistics and Research Methodology (BP801TT) 15. Mean for following Data Age 18-20 Child 8 a. 11.9 b. 25.9 c. 29.5 d. 19.5 Ans: b

21-23 2

24-26 15

27-29 17

30-32 4

33-35 4

16. is the equation for a. Arithmetic mean by direct method b. Arithmetic mean by short cut method c. Arithmetic mean by Step deviation method d. Arithmetic mean by indirect method Ans: c 17. If all the weights in weighted arithmetic mean are equal, then the weighted mean is the same as the . a. Arithmetic mean b. Geometric mean c. Median d. Mode e. Option a and b f. Option c and d Ans: a 1. e: Geometric Mean and Harmonic Mean 18.

1

= 𝐴𝑛𝑡𝑖𝑙𝑜𝑔 [ 𝛴𝑙𝑜𝑔𝑥] 𝑛

a. Harmonic mean b. Geometric mean c. Arithmetic mean d. Weighted arithmetic mean Ans: b 19. What is Harmonic mean for : 18, 12, 16, 21, 7, 9 a. 11.9 b. 9.1 c. 1.9 d. 12 Ans: a

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Biostatistics and Research Methodology (BP801TT) 20. Geometric mean is defined as the nth root of the product of n values. True or False? a. True b. False Ans: a 1.f : Median and Mode 21. Calculate median of the following data gives the height of five student in c.m., 168, 173, 153, 164, 158 a. 153 b. 173 c. 168 d. 164 Ans: d 22.

=𝐿+

( 2𝑁– 𝑐𝑓) 𝑓

𝑥𝑖

a. Median b. Mode c. Harmonic Mean d. Quartile deviation e. Standard deviation Ans: a 23. Find median of daily wages of employees in hospital Wage 140 174 180 No. of employee

3

14

8

185

200

210

22

6

2

a. 180 b. 185 c. 200 d. None of above Ans: b 24. Calculate Median for following data Wage 80-100 No. of employee

8

100-120

120-140

140-160

160-180

12

16

8

6

a. 125.125 b. 100.125 c. 101.125 d. 103.125 Ans: d

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Biostatistics and Research Methodology (BP801TT)

25.

=

a. Median b. Mode c. Harmonic Mean d. Quartile deviation e. Standard deviation Ans: b 26. Calculate mode for following data Wage No. of employee a. 112.857 b. 110.112 c. 112.112 d. 25 Ans: a

80-90 8

90-100 14

100-110 21

110-120 25

120-130 15

130-140 10

140-150 7

1.g: Types of Measures of Dispersion 27. Which is NOT type of variability? a. Biological variability b. Random variability c. Real variability d. Experimental variability Ans: b 28. Which is NOT type of Measure of Dispersion? a. Mean b. Range c. Mean absolute deviation d. Standard Deviation e. Quartile Deviation Ans: a 29. What is the coefficient of range for the given data : 8, 6, 7, 9, 12, 3, 15, 18, 5, 6 a. 6 b. 15 c. 0.714 d. 21 Ans: c

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Biostatistics and Research Methodology (BP801TT) 30. Find coefficient of Mean deviation for : 10, 20, 28, 34, 23, 17 a. 0.285 b. 0.287 c. 2.87 d. 8.27 Ans: b 31. The square of standard deviation is called a. Quartile deviation b. Mean absolute deviation c. Range d. Variance Ans: d 32. Coefficient of variation also known as a. Coefficient of Quartile deviation b. Standard deviation c. Relative Standard deviation d. Coefficient of Mean deviation Ans: c 2

(𝑥−𝑥) =√ 33.3 𝑁 3 . a. Coefficient of Variation b. Variance c. Coefficient of Mean deviation d. Standard deviation e. Correlation coefficient Ans: d

34. What is Standard deviation for: 10, 20, 30, 40, 50, 60, 70 a. 20 b. 200 c. 400 d. 40 Ans: a 1.h: Correlation 35. The value of correlation coefficient will very from a. 0 to 1 b. -1 to +1 c. -∞ to +∞ d. -1 to 0 Page 8

Biostatistics and Research Methodology (BP801TT) Ans: b

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Biostatistics and Research Methodology (BP801TT) 36. If the value of one variable is increase, then value of other variable also increases on an average, then the correlation said to be positive. True or False? a. True b. False Ans: a 37. If the value of one variable decreases, then the value of other variable decreases on an average, then the correlation said to be Negative correlation. True or False? a. True b. False Ans: b 38. The relationship between more than two variables is said to be a. Simple Correlation b. Random Correlation c. Parital Correlation d. Multiple correlation Ans: d 39. r = 0 indicates… a. a positive correlation between variables b. a negative correlation between variables c. no correlation between variables d. All of above Ans: c

40. a. Perfect positive correlation b. Perfect negative correlation c. Positive correlation d. Negative correlation e. None of above Ans: e

Figure indicates

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Biostatistics and Research Methodology (BP801TT) 41. If the points are widely scattered in a graph, the correlation is said to be a. Highly Negative b. Negative c. Zero d. None of above Ans: c 42. Equation 𝑟 =

𝛴𝑋𝑌

Stands for

√𝛴𝑋2 𝑌2

a. Spearman’s Rank coefficient of correlation b. Quartile deviation c. Karl pearson’s coefficient of correlation d. coefficient of condurrent deviation. Ans: c 43. Which is equation for spearman’s rank coefficient of correlation? a.

𝛴𝑋𝑌 √𝛴𝑋2𝑌2 2

(𝑥−𝑥) b. √ 𝑁

c. 𝐿 +

( 2𝑁– 𝑐𝑓)

d. 1 −

𝑓 6𝛴𝑑2

𝑥𝑖

𝑛(𝑛 2−1)

Ans: d 44. Calculate coefficient of concurrent deviation for following data: X 10 15 16 18 13 Y 2 6 8 10 7 a. 0.1773 b. 5.7735 c. 0.5773 d. None of above Ans: c

12 11

14 9

2.a: Regression 45. In regression analysis independent variable is also known as a. Regressor b. Predictor c. Explanatory variable d. All of above e. None of above Ans: d

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Biostatistics and Research Methodology (BP801TT) 46. The equation for the standard error of the regression (S) is a. b. c. d.

𝑁𝛴 (𝑥𝑦)− 𝛴𝑥 𝛴𝑦 𝑁 𝛴 (𝑥2)− (𝛴𝑥)2 𝛴𝑦−𝑚𝛴𝑥 𝑁 𝘍 𝟐 √𝜮(𝒚−𝒚 ) 𝒏−𝟐 𝛴𝑋𝑌

√𝛴𝑋 2𝑌 2

Ans: c 2.b : Probability 47. What is probability of head when tossing coin one time? a. 1 b. 2 c. 1.5 d. 0.5 Ans: d 48. What is probability of 3 when throwing dice once. a. 1/6 b. 2/6 c. 3/6 d. 1 e. None of above Ans: a 49. In probability theory, two events are said to be mutually exclusive if they cannot occur at the same time or simultaneously. True or False? a. True b. False Ans: True 50. If one event is unaffected by the outcome of another event, the two events are said to be a. Dependent b. Independent c. Mutually exclusive d. All of the above e. Both b and c Ans: b

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Biostatistics and Research Methodology (BP801TT) 51. Which is true for Probability of an Event P(E). a. 0 ≤ P(E) ≤ 1 b. 0 < P(E) ≤ 1 c. 0 ≤ P(E) < 1 d. 0 < P(E) < 1 e. None of above Ans: a 52. Five coins are thrown simultaneously. Find the chance of getting four heads. a. 5/64 b. 7/64 c. 1/64 d. None of above Ans: a 53. Suppose, we have a production process of some item that is manufactured in large quantities. We find that, in general, the proportion of defective items is p = 0.01, A random sample of l00 items is selected. What is the probability that there are no defective items in this sample? a. 0.184 b. 0.921 c. 0.368 d. 0.08 Ans: c 54. 𝑃(𝑥) =

𝜆𝑥𝑒−𝜆 𝑥!

equation Stands for

a. Binomial distribution b. Poisson distribution c. Normal distribution d. All of above Ans: b 55. For Normal Distribution which statement is false? a. For Normal distribution, mean = median = mode b. It is symmetry about the center c. 50% of values less than the mean and 50% greater than the mean d. None of above Ans: d 56. Gaussian distribution is known as a. Normal distribution b. Binomial distribution c. Poisson distribution d. Random distribution Ans: a

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Biostatistics and Research Methodology (BP801TT) 2.c : Sampling 57. Which is NOT Probability sampling technique? a. Simple random Sampling b. Stratified random sampling c. Cluster Random Sampling d. Quota Sampling Ans: d 58. Which is NOT Non-Probability sampling technique? a. Snowball sampling b. Purposive sampling c. Cluster Random Sampling d. Quota Sampling Ans: c 59. Nonprobability sampling techniques involve random selection. True or False? a. True b. False Ans: b 60. Purposive Sampling techniques is also known as a. Snowball sampling b. Haphazard sampling c. Quota sampling d. Judgmental Sampling Ans: d

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