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You should practice these questions to improve fundamentals of Data Analytics with Python needed for various interviews (like company interview, campus interview, walk-in interview), entrance exams, placements and other competitive exams. All the questions in this particular section are based on only “** Data Analytics with Python NPTEL Week 3 Assignment Solutions**“.

### Course layout

** Week 1: Basics of Python Spyder**Week 2 :

**Introduction to probability**

**Week 3 : Sampling and sampling distributions**

**Week 4 : Hypothesis testing**

**Week 5 : Two sample testing and introduction to ANOVA**

**Week 6 : Two way ANOVA and linear regression**

**Week 7 :**

**Linear regression and multiple regression**

**Week 8 : Concepts of MLE and Logistic regression**

**Week 9 : ROC and Regression Analysis Model Building**

**Week 10 : c**

^{2}Test and introduction to cluster analysis

**Week 11 : Clustering analysis**

**Week 12 : Classification and Regression Trees (CART)**

**NOTE:** You can check your answer immediately by clicking show answer button. Moreover, this set of “Data Analytics with Python NPTEL Week 3 Assignment Solution” contains 10 questions.

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### Data Analytics with Python NPTEL Week 3 Assignment Solutions

**Q1.** Sate True or False: Statement: The specific value of a random variable is called estimator

a) True

b) False

**Answer:**

**Q2.** If the true proportion of customers who are below 100 kg weight is 0.4, what is the probability that a sample size 100 yields a sample proportion between 0.3 to 0.4

a) 0.961

b) 0.827

c) 0.706

d) 0.479

**Answer:**

**Q3.** 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.

**Answer:**

**Q4.** The Poisson probability distribution is which of the following type?

a) Continuous probability distribution

b) Discrete probability distribution

c) Uniform probability distribution

d) Normal probability distribution

**Answer:**

**Q5.** Assuming a binomial experiment with p = 0.5 and a sample size of 100. The expected value of this distribution is?

a) 0.50

b) 0.30

c) 100

d) 50

**Answer:**

**Q6.** A hypergeometric probability distribution is identical to

a) the Poisson probability distribution

b) the binomial probability distribution

c) the normal distribution

d) None of these alternatives is correct

**Answer:**

**Q7.** Why one should not go for sampling?

a) Less costly to administer than a census.

b) The person authorizing the study is comfortable with the sample.

c) Because the research process is sometimes destructive

d) None of the above

**Answer:**

**Q8.** A car distributor in city Y experiences on an average 2.5 car sales per day. Find the probability that on a randomly selected day, they will sell 5 car:

a) 0.0668

b) 0.544

c) 0.082

d) 0.205

**Answer:**

**Q9.** In question 8, Find the probability that on a randomly selected day, they will sell no cars:

a) 0.0668

b) 0.544

c) 0.082

d) 0.205

**Answer:**

**Q10.** In question 8, 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

**Answer:**

### Previous Year Data Analytics with Python NPTEL Week 3 Assignment Solutions

**Q1.** State True or False:

Statement: The specific value of a random variable is called estimator

a) True

b) False

Answer: b) False

**Q2.** If the true proportion of customers who are below 20 years is P=0.35, what is the probability that a sample size 100 yields a sample proportion between 0.3 to 0.4

a) 0.961

b) 0.827

c) 0.706

d) 0.53

Answer: c) 0.706

**Q3.** 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

Answer: c) the population is first divided into strata, and then random samples are drawn from each stratum

**Q4.** State True or False:

Statement: A population is a set of all items or individual of interest

a) True

b) False

Answer: a) True

**Q5.** 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

Answer: a) 0.9997

**Q6.** On an average 5 % items supplied by manufacturer X are defectives. 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

Answer: b) 0.075

**Q7.** A car distributor in city Y experiences on an average 2.5 car sales per day. Find the probability that on a randomly selected day, they will sell 5 car:

a) 0.0668

b) 0.544

c) 0.082

d) 0.205

Answer: a) 0.0668

**Q8.** A car distributor in city Y experiences on an average 2.5 car sales per day. Find the probability that on a randomly selected day, they will sell no car:

a) 0.0668

b) 0.544

c) 0.082

d) 0.205

Answer: c) 0.082

**Q9.** A random sample of 100 people shows that 25 of them are females and rest are males. Form a 95% confidence interval for the true proportion of females. The lower limit of this interval will be:

a) 0.150

b) 0.145

c) 0.165

d) 0.175

Answer: c) 0.165

**Q10.** A random sample of 100 people shows that 25 of them are females and rest are males. Form a 95% confidence interval for the true proportion of females. The upper limit of this interval will be:

a) 0.150

b) 0.165

c) 0.465

d) 0.335

Answer: d) 0.335

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