NPTEL Data Analytics with Python Week 3 Assignment Answers 2024

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
`Answer :- For Answer Click Here`

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
`Answer :- For Answer Click Here`

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
`Answer :- For Answer Click Here`

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
`Answer :- For Answer Click Here`

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 Answer Click Here`