NPTEL Data Analytics with Python Week 10 Assignment Answers 2025
1. Sampling distribution for a goodness of fit test is the
- Poisson distribution
- t-distribution
- normal distribution
- chi-square distribution
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2. Goodness of fit test is always conducted as a
- lower-tail test
- upper-tail test
- middle test
- None of these alternatives is correct
Answer :-
3. State True or False: Statement: Null hypothesis for chi square test of independence assumes that, all the proportions are equal.
- True
- False
Answer :-
4. Statistical test conducted to determine whether to reject or not reject a hypothesized probability distribution for a population is known as a ____________
- contingency test
- probability test
- goodness of fit test
- None of these alternatives is correct
Answer :-
5. What is the minimum no. of variables/ features required to perform clustering?
- 0
- 1
- 2
- 3
Answer :-
6. The degrees of freedom for a contingency table with 12 rows and 12 columns is
- 144
- 121
- 12
- 120
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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 .05 level of significance, the critical value for the test is ____________
- 1.645
- 7.815
- 14.067
- 15.507
Answer :-
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
- 1 Only
- 1 & 2
- 1 & 4
- 1,2,3 & 4
Answer :-
9. Let x1 = (1,2) and x2 = (3,5) be the co-ordiantes for two objects. The Euclidean and Manhattan distance between these two objects is ______________ respectively
- 4.2 and 3
- 3.15 and 2
- 3.61 and 5
- None of the above
Answer :-
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 _____________
- 83
- 90
- 30
- 10
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