JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech I Year BIOSTATISTICS Previous Question Paper (January/February - 2024 - R22)
Note: This question paper contains two parts A and B. Part-A is a compulsory question. Part-B consists of ten questions (numbered from 2 to 11). From each unit, there are two questions and the student should answer one of them. Hence, the student should answer five questions from Part-B.
Part A
(10 Marks)
For which type of graphical representation Pie chart is most useful?
Answer
A pie chart is most useful for representing categorical data to show the proportional composition or relative parts of a whole.
When you collect data through specific survey, is to be classified as secondary or primary data?
Answer
Data collected through a specific survey conducted by the researcher is classified as primary data.
What is a median?
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Define range.
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When can a normal distribution be used as approximation to binomial distribution?
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What is the area between the ordinates at a range of minus two sigma to plus two sigma in a normal curve?
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Does t distribution have greater or lesser dispersion compared to standard normal distribution?
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What is type II error in null hypothesis testing?
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Does correlation always signify cause and effect?
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Which does indicate the nature of relationship between the variables? Correlation or Regression?
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Part B
(50 Marks)
Distinguish between positively and negatively skewed distribution.
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What are the various methods of studying kurtosis?
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Draw a suitable diagram to represent the following data. Also show the profit or loss as the case may be.
| Particulars | Selling price per unit (Rs) | Qty sold | Wages (Rs) | Materials (Rs) | Others (Rs) |
|---|---|---|---|---|---|
| Factory A | 400 | 20 | 3200 | 2400 | 1600 |
| Factory B | 600 | 30 | 6000 | 6000 | 9000 |
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In a certain factory a unit of work is completed by A in 10 minutes, by B in 15 minutes, by C in 12 minutes and by D in 20 minutes. What is the average number of units of work completed per minute?
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What are the requisites of a good measure of dispersion?
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Calculate standard deviation and its coefficient of variation from the following data:
Measurements: 0-5, 5-10, 10-15, 15-20, 20-25
Frequency: 4, 1, 10, 3, 2
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Five cards are drawn in succession and without replacement from an ordinary deck of 52 well shuffled cards. Calculate the probabilities for the scenarios provided.
What is the probability that there will be no ace among the five cards?
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What is the probability that first three cards are aces, and the last two cards are kings?
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What is the probability that only first three cards are aces?
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What is the probability that an ace will appear only on the fifth draw?
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What are the features and uses of binomial distribution?
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What are the properties of normal probability curve?
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What are the properties of t distribution? Under which conditions it is used for test of hypothesis?
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Distinguish probability sampling from non-probability sampling.
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Ten students are selected at random from a school and their heights are found to be, in inches, 50, 52, 52, 53, 55, 56, 57, 58, 58 and 59. In the light of these data, discuss the suggestion that the mean height of the students at the schools is 54 inches. You may use 5% level of significance for applying âtâ test.
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What is a scatter diagram? How is scatter diagram helpful in the study of correlation?
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Calculate the regression equation of X on Y:
X : 1 2 3 4 5
Y : 2 5 3 8 7
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