# Bio-statistics MCQs-Part-I

M.C.Q’s of Bio-statistics

1. The mean of the data a, a, a, a will be
a. Zero
b. a
c. 2
d. none of the above

2. The mean of the square deviation about mean is known as;
a. Mean
b. Median
c. Variance
d. Standard deviation

3. If sum of 20 values is 300 then mean of the data is;
a. 15
b. 20
c. 30
d. 300

4. If we add or subtract any value in the original any value in the original data then this process is known as;
a. Change of scale
b. Change of origin
c. Both a and b
d. None of the above

5. The mean of the 10 values is 20, if we add a value 10 in each observation then mean for the new value will be ;
a. 20
b. 0
c. 30
d. 10
6. When two coins are tossed together then probability of getting no tail is;
a. 0
b. ½
c. ¼
d. 1

7. The mean value or central value or average value of a data are;
a. All same value
b. All different value
c. None of these
d. Always negative

8. When “n” is an odd number then median is defined as;
a. Middle value
b. Median of two middle values
c. Sum of the values
d. Most repeated value

9. For a group data the class interval having maximum frequency is known as
a. Median class
b. Mode
c. Median
d. Model class

10. The sum of the deviation about mean for the data 6, 8, 10, 2, and 4 is always;
a. 1
b. 0
c. Negative
d. 30

11. If the calculated value of chi-squire lies in the region of acceptance, then we;
a. Accept Ho
b. Reject Ho
c. No conclusion
d. None of the above

12. Chi-square test is always used to test;
a. Population mean
b. Population median
c. Test of association
d. None of these

13. Pulse rate or weight of patient are known as;
a. Nominal data
b. Continuous data
c. Discrete data
d. Random variable

14. Classification of objects or persons into classes or groups in such a way that only one object or person falls in only one group at a time is called as;
a. Mutually exclusive
b. None Mutually exclusive
c. Dependent
d. Independent

15. In testing hypothesis we use different level of significance to test Ho , in most situations level of significance is not given then we have to use;
a. 1 %
b. 2 %
c. 5%
d. 10%

16. If we want to compare two or more groups then we use coefficient of variation (C.V), the group which has maximum C.V is known as the more;
a. Consistent
b. Not consistent
c. None of the above
d. It is not possible

17. When we make a 95% confidence interval for the population mean using t or z test then probability or chance of error will be;
a. 0.05
b. 0.1
c. 1
d. 5

18. A variable which has some chance or probability of its occurrence is known as;
a. Simple variable
b. Qualitative variable
c. Quantitative variable
d. Random variable

19. The sample mean x is known as the point estimator of the population;
a. Median
b. Mode
c. Variance
d. Mean μ

20. In all research analysis it is not possible to study whole population, we always estimate population parameters on the basis of;
a. Population information
b. Sample information
c. We could not estimate parameters
d. Estimation of samples

21. Sampling is the process of drawing samples from the population, when the chance or probability of each member of the population is equal than such sampling design known as;
a. Simple random sampling
b. Not random sampling
c. Judgment sampling
d. None of these

22. Estimation is the process of estimating parameters on the basis of;
a. Parameters
b. Statistics
c. A and B
d. None of the above

23. If random sample size 4 taken from a population whose variance is 16. When sampling is done with replacement than variance of the sample mean is;
a. 2
b. 16
c. 4
d. 48

24. When the size of samples is increasing then variance of sample means is also;
a. Increases
b. Decreases
c. Constant
d. None of the above

25. When two dice and a single coin are tossed together then total sample spaces will be;
a. 36
b. 14
c. 24
d. 72 (Rational 6*6*2=72)
26. Student t-test is used to test population mean when population variance is always unknown and the sample size is;
a. Less than 30
b. More than 30
c. Any size
d. None of them

27. The minimum d.f for the Chi-square test of independence or association is always;
a. 0
b. 1
c. 2
d. N-1

28. If Chi-square test’s calculated value is less than critical value then o H is always be;
a. Accepted and rejected both
b. Accepted
c. Rejected
d. None of these

29. P-value is the probability of the calculated value, if p-value is zero then we reject the o H after comparing with;
a. Level of significance
b. Critical value
c. d.f
d. sample size

30. squire root of the mean of squire deviation is known as;
a. variance
b. median
c. SD
d. Mean

31. A type of qualitative data where zero is not fixed (arbitrary) termed as;
a. Discrete
b. Continuous
c. Ratio
d. Interval

32. A subset of all the measurement of interest is;
a. Sample
b. Population
c. Sample unit
d. None of these

33. All of the following are an example of qualitative data except;
a. Sex
b. Age
c. Educational level
d. Socioeconomic status

34. All of the following are an example of quantitative data except;
a. Gender
b. Height
c. Weight
d. Temperature

35. Mean is the measure of central tendency can be calculated for all of the following except;
a. Age
b. Weight
c. Systolic BP
d. Marital status

36. Which one is formula for empirical rule
a. μ± 1SD = 60%
b. μ± 1SD = 65%
c. μ± 1SD = 68%
d. μ± 1SD = 70%

37. Following all are true for mean EXCEPT;
a. Applicable for continuous data
b. Not applicable for qualitative data
c. Do not affect by extraneous values
d. Affected by each value in data set

38. Fourth step of hypothesis testing is;
a. Level of significance
b. Test statistic
c. Rejection region
d. None of these

39. The most frequent occurring observation is
a. Mean
b. Median
c. Mode
d. SD

40. When the distribution of data is skewed, one should ideally use;
a. Mean
b. Median
c. Mode
d. None of these

41. Sample SD is denoted by;
a. S
b. S2
c.
d.

42. Z-core is calculated for;
a. Chi-quire distribution
b. Standard normal distribution
c. T-distribution
d. Normal distribution

43. A hospital claims, its ambulance response time is less than 10 minutes, it can be written as;
a. o H >10 min, A H ≤ 10 min
b. o H ≤10 min, A H > 10 min
c. o H ≠10 min, A H = 10 min
d. o H – 10 min, A H / 10 min

44. Chi-quire test of significance is used when;
a. Data is continuous
b. Data is categorical
c. Data is discrete
d. None of these

45. In normal distribution curve, mean of the data lie on the
a. Right end
b. Centre
c. Left end
d. None of these

46. Parameters of standard normal distribution are;
a. Mean
b. SD
c. Range
d. Both a and b

47. Which one the following is true for standard normal distribution;
a. Mean = 0
b. Mean = 50
c. Mean = 100
d. Mean = 0.5

48. When mean, median, and mode lie in the centre of the curve, the distribution is known as;
a. Right skewed
b. Left skewed
c. Chi-squire
d. Normal

49. In 95% confidence interval, the level of significance (α) is;
a. 0.01
b. 0.05
c. 0.1
d. None of these

50. All of the following are true for student t-test except;
a. Sample size 30
b.  = unknown
c. Approximate Z when N>30
d. Use for qualitative data

51. Which one the formula is used for df in chi-squire distribution;
a. (row)(column)
b. (row-column)
c. (row-1)(column-1)
d. (row-1)(column)

52. All of the following are true for measure of dispersion except;
a. Mean
b. Range
c. Inter-quartile range
d. Variance

53. What is the relationship between SD and variance;
a. Variance = SD
b. Variance = SD/n
c. Variance = (SD)2
d. None of these

54. First step in calculating median is;
a. Calculate range
b. Arrange data
c. Count the data
d. None of these

55. What is true for descriptive statistics;
a. Organization & displaying of data
b. Drawing inferences for population
c. Hypothesis testing
d. Calculation p-value

56. The area under normal distribution curve is;
a. 1
b. 0.5
c. 0
d. None of these

57. Negative z-score shows that;
a. Observation is below to mean
b. Observation is above to mean
c. Observation is equal to mean
d. None of these