Data Analytics with Python Nptel Week 10 Assignment Answers
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Data Analytics with Python Nptel Week 10 Quiz Answers (Jan-Apr 2025)
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1) Sampling distribution for a goodness of fit test is the
a) Poisson distribution
b) t-distribution
c) normal distribution
d) chi-square distribution
2) Goodness of fit test is always conducted as a
a) lower-tail test
b) upper-tail test
c) middle test
d) None of these alternatives is correct
3) State True or False: Statement: Null hypothesis for chi square test of independence assumes that all the proportions are equal.
a) True
b) False
4) Statistical test conducted to determine whether to reject or not reject a hypothesized probability distribution for a population is known as a
a) contingency test
b) probability test
c) goodness of fit test
d) None of these alternatives is correct
5) What is the minimum number of variables/features required to perform clustering?
a) 0
b) 1
c) 2
d) 3
Data Analytics with Python Nptel Week 10 Quiz Answers
6) The degrees of freedom for a contingency table with 12 rows and 12 columns is
a) 144
b) 121
c) 12
d) 120
7) The table below gives beverage preferences for random samples of teens and adults:
| Teens | Adults | Total | |
|---|---|---|---|
| Coffee | 50 | 200 | 250 |
| Tea | 100 | 150 | 250 |
| Soft Drink | 200 | 200 | 400 |
| Other | 50 | 50 | 100 |
| Total | 400 | 600 | 1000 |
We are asked to test for independence between age (i.e., adult and teen) and drink preferences. With a 0.05 level of significance, the critical value for the test is
a) 1.645
b) 7.815
c) 14.067
d) 15.507
8) How can Clustering (Unsupervised Learning) be used to improve the accuracy of the Linear Regression model (Supervised Learning)?
- Creating different models for different cluster groups.
- Creating an input feature for cluster ids as an ordinal variable.
- Creating an input feature for cluster centroids as a continuous variable.
- Creating an input feature for cluster size as a continuous variable.
a) 1 Only
b) 1 & 2
c) 1 & 4
d) 1, 2, 3 & 4
9) Let x₁ = (1,2) and x₂ = (3,5) be the coordinates for two objects. The Euclidean and Manhattan distance between these two objects is __________ respectively.
a) 4.2 and 3
b) 3.15 and 2
c) 3.61 and 5
d) None of the above
10) Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year’s student body showed the following number of students in each classification:
- Freshmen: 83
- Sophomores: 68
- Juniors: 85
- Seniors: 64
We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year. The expected number of freshmen is
a) 83
b) 90
c) 30
d) 10
For answers to additional Nptel courses, please refer to this link: NPTEL Assignment
Data Analytics with Python Nptel Week 10 Quiz Answers (Jan-Apr 2025)