### Biostatistics and Research Methodology

#### 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 â€“ 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**

#### 1.c : Graphical Presentation of Frequency Distribution

**6. Age and Salary are Continuous variables. True or False?**

a. True

b. False

Ans: a

**7. Figure indicates which type of Graph?**

a. Line frequency Graph

b. Histogram

c. Frequency polygon

d. Ogive

e. Frequency Curve

Ans: c

**8. Figure indicated which type of graph?**

a. Histogram

b. Frequency polygon

c. Ogive

d. Frequency Curve

**Ans: c**

**9. Cumulative Frequency curve also known as_____**

a. Histogram

b. Frequency Polygon

c. Grouped Frequency

d. Line frequency curve

e. Ogive

**Ans: e**

#### 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.**

**15. Mean for following Data _____**

a. 11.9

b. 25.9

c. 29.5

d. 19.5

**Ans: b**

**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???? ????????????????????]**

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**

**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. _________ = ???? +(????/2â€“ ????????)/???????? ????**

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**

a. 180

b. 185

c. 200

d. None of above

**Ans: b**

**24. Calculate Median for following data**

a. 125.125

b. 100.125

c. 101.125

d. 103.125

**Ans: d**

**25. ________ =**

a. Median

b. Mode

c. Harmonic Mean

d. Quartile deviation

e. Standard deviation

**Ans: b**

**26. Calculate mode for following data**

a. 112.857

b. 110.112

c. 112.112

d. 25

**Ans: a**

#### 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**

**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**

**33. _______ = âˆš(????âˆ’????Ì…)2????**

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. -âˆž to +âˆž

d. -1 to 0

**Ans: b**

**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 indicatesâ€¦**

a. a positive correlation between variables

b. a negative correlation between variables

c. no correlation between variables

d. All of above

**Ans: c**

**40. Figure indicates ______**

a. Perfect positive correlation

b. Perfect negative correlation

c. Positive correlation

d. Negative correlation

e. None of above

**Ans: e**

**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 ???? =????????????âˆš????????2????/2 Stands for ______**

a. Spearmanâ€™s Rank coefficient of correlation

b. Quartile deviation

c. Karl pearsonâ€™s coefficient of correlation

d. coefficient of condurrent deviation.

**Ans: c**

**43. Which is equation for spearmanâ€™s rank coefficient of correlation?**

**44. Calculate coefficient of concurrent deviation for following data:**

a. 0.1773

b. 5.7735

c. 0.5773

d. None of above

**Ans: c**

#### 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**

**46. The equation for the standard error of the regression (S) is _______**

#### 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**

**51. Which is true for Probability of an Event P(E).**

a. 0 â‰¤ P(E) â‰¤ 1

b. 0 < P(E) â‰¤ 1

c. 0 â‰¤ 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. ????(????) =???????????? âˆ’????/????! 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**

#### 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**