Data Analytics with Python Nptel Week 3 Assignment Answers

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Data Analytics with Python Nptel Week 3 Quiz Answers (Jan-Apr 2025)


1) The specific value of a random variable is called an estimator.
a) True
b) False

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2) 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?
a) 0.961
b) 0.827
c) 0.706
d) 0.053

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3) Stratified random sampling is a method of selecting a sample in which:
a) The sample is first divided into strata, and then random samples are taken from each stratum.
b) Various strata are selected from the sample.
c) The population is first divided into strata, and then random samples are drawn from each stratum.
d) None of these alternatives is correct.

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4) The interval estimate provides more information about a population characteristic than the point estimate.
a) True
b) False

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5) A question paper contains 90 multiple-choice questions. There are 4 alternative answers (A, B, C, or D), out of which only one is correct. Mr. X answers these questions randomly (i.e., without preparation). What is the probability that X gets a score of at least 10 marks?
a) 0.9997
b) 0.7894
c) 0
d) 0.001

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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?
a) 0.065
b) 0.075
c) 0.085
d) 0.095

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Data Analytics with Python Nptel Week 3 Quiz Answers (Jan-Apr 2025)


7) A car distributor in city Y experiences an average of 2.5 car sales per day. Find the probability that on a randomly selected day, they will sell 5 cars.
a) 0.0668
b) 0.544
c) 0.082
d) 0.095

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8) In question 7, find the probability that on a randomly selected day, they will sell no cars.
a) 0.00668
b) 0.544
c) 0.0082
d) 0.0905

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9) In question 7, find the probability that on a randomly selected day, they will sell at most 2 cars.
a) 0.0668
b) 0.544
c) 0.082
d) 0.205

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10) In question 7, find the probability that on a randomly selected day, they will sell exactly one car.
a) 0.0668
b) 0.544
c) 0.082
d) 0.205

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Data Analytics with Python Nptel Week 3 Quiz Answers (Jan-Apr 2025)

For answers to additional Nptel courses, please refer to this link: NPTEL Assignment