## NPTEL Data Analytics with Python Week 3 Assignment Answers 2024

1. Why one should not go for sampling?

- It is less costly to administer than a census
- The person authorising the study is comfortable with the sample.
- Because the research process is sometimes destructive
- None of the above

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2. Stratified random sampling is a method of selecting a sample in which

- the sample is first divided into strata
- various strata are selected from the sample
- The population is first divided into strata, and then random samples are drawn from each stratum
- None of the above

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3. If the true proportion of customers who are below 20 years is P=0.35, what is the probability that a sample size of 100 yields a sample proportion between 0.3 to 0.4

- 0.961
- 0.827
- 0.706
- 0.53

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4. Calculate the probability of getting 12 heads in 20 attempts from a fair coin.

- 0.120
- 0.240
- 0.280
- 0.301

Answer :-

5. A question paper contains 90 multiple-choice questions. Each correct answer carries 1 mark. There are 4 alternative answers (A, B, C or D), of which only one is correct. Mr X answers these questions randomly (i.e. without preparation). What is the probability that X gets at least 10 marks?

- 0.9997
- 0.7894
- 0
- 0.001

Answer :-

6. On average, 5 % of items supplied by manufacturer X are defective. If a batch of 10 items is inspected: what is the probability that 2 items are defective

- 0.065
- 0.075
- 0.085
- 0.095

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7. A car distributor in City Y experiences an average of 2.5 car sales daily. Find the probability that on a randomly selected day, they will sell 5 car:

- 0.0668
- 0.544
- 0.082
- 0.205

Answer :-

8. In question 7, Find the probability that on a randomly selected day, they will sell no cars::

- 0.0668
- 0.544
- 0.082
- 0.205

Answer :-

9. In question 7, Find the probability that on a randomly selected day, they will sell at most 2 cars:

- 0.0668
- 0.544
- 0.082
- 0.205

Answer :-

10. In question 7, Find the probability that on a randomly selected day, they will sell exactly one car:

- 0.0668
- 0.544
- 0.082
- 0.205

Answer :-For AnswerClick Here