ABOUT THE COURSE :
We are looking forward to sharing many exciting stories and examples of analytics with all of you using python programming language. This course includes examples of analytics in a wide variety of industries, and we hope that students will learn how you can use analytics in their career and life. One of the most important aspects of this course is that you, the student, are getting hands-on experience creating analytics models; we, the course team, urge you to participate in the discussion forums and to use all the tools available to you while you are in the course!
CRITERIA TO GET A CERTIFICATE
Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100
Final score = Average assignment score + Exam score
YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.
1.State True or False: Statement: Null hypothesis for chi square test of independence assumes that, all the proportions are equal.
(B) False
Answer :- A
2. 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
Answer :- C
3. What is the minimum number of variables/features required to perform clustering?
(A) 0
(B) 1
(C) 2
(D) 3
Answer :- B
4. An important application of the chi-square distribution is
(A) making inferences about a single population variance
(B) testing for goodness of fit
(C) testing for the independence of two variables
(D) All of these alternatives are correct.
Answer :- D
5. The bigger the chi-square statistic, _________ the p-value https://drive.google.com/file/d/1Zm_8hbjB4DInmVgj3InfJT5lXyTAzeE1/view?usp=sharing
(A) bigger
(B) smaller
(C) does not vary
(D) None of these
Answer :- B
6. State True or False: The shape of Chi-square distribution is left-skewed
(A) True
(B) False
Answer :- B
7. Determine the chi-square statistic for the following data. https://drive.google.com/file/d/1zfHWEFZ3A1_gCIOUQFpbam3cCgb2DEDg/view?usp=sharing
(A) 0
(B) 52.75
(C) 32
(D) None of these
Answer :- B
8. For the given data, if significance level is 5% and degrees of freedom = 4, what is the chi-square value? https://drive.google.com/file/d/1zfHWEFZ3A1_gCIOUQFpbam3cCgb2DEDg/view?usp=sharing
(A) 11.07
(B) 12.592
(C) 9.488
(D) 7.815
Answer :- C
9. The degrees of freedom for a contingency table with 6 rows and 3 columns is
(A) 18
(B) 15
(C) 6
(D) 10
Answer :- D
10. In K-means clustering, K stands for _________
(A) Number of data points
(B) Error function parameters
(C) Number of clusters
(D) None of these
Answer :- C