Page 179 - Data Science class 10
P. 179
4. A ____________________ occurs when a sample is selected from the wrong population data.
5. ____________________ is the fundamentals of how statistical predictions are made.
Standard Questions (Section B)
A. Short answer type questions:
1. Define the term Facts and Opinion.
2. Mention any two types of prejudice.
3. What is bias?
4. Give any one example of prejudice and bias.
5. How will you explain Standard Deviation?
B. Long answer type questions:
1. Why is the Central Limit Theorem so important to statistical analysis?
2. Explain Recall Bias with the help of an example. [CBSE Handbook]
3. Explain Linearity Bias with the help of an example. [CBSE Handbook]
4. Explain Confirmation Bias with the help of an example. [CBSE Handbook]
5. Write the formula for Central Limit Theorem.
6. Why does the bias occur in first place?
7. What will be the sampling error at a 99% confidence level when the standard deviation of the population is 0.2 and the
sample size is 36?
8. A group of 60 players is randomly split into 3 teams of equal size. All partitions are equally likely. Rohit and Virat are two
players belonging to that group. What is the probability that Rohit and Virat will end up in the same team?
Inter-Disciplinary
Higher Order Thinking Skills (HOTS)
1. As per reports, in October 2019, researchers found that an algorithm used on more than 200 million people in US
hospitals to predict which patients would likely need extra medical care heavily favoured white patients over black
patients. Can you reason about what must have caused this bias and categorise it into the types of bias that you learnt
in this chapter? [CBSE Handbook]
2. The recorded percentage of the population who speak English in India are following a normal distribution. The mean
and the standard deviations are 62 and 5, respectively. If a person is eager to find the record of 50 people in the
population, then what would be the mean and the standard deviation of the chosen sample? [CBSE Handbook]
Applied Project Life Skills & Values
Consider that your friend is planning to open a clothing store in your area. With the help of central limit theorem, determine
what should be the type and collection of clothes that will sell better in your area. [CBSE Handbook]
Answers
Exercise (Section A)
A. 1. a 2. b 3. c 4. d 5. a 6. d 7. b 8. c 9. b 10. a
B. 1. F 2. T 3. T 4. F 5. T 6. F 7. T 8. T 9. T 10. F
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