Quiz Space

Statistics for Data Science I · End Term · 13 Apr 2025 · January 2025 term · Set QDD3

Question 13: The probability mass function of a discrete random varia…

Question 13

+2 marksNumerical answer

The probability mass function of a discrete random variable X is given by,

Based on the above data, answer the given subquestions.

Find the value of V (3X − 4).

Show answer

Correct answer: 18

See the whole paperTake it as a mock test

Question 13 of 17 in the IIT Madras BS Statistics for Data Science I (Stats 1) End Term paper sat on 13 Apr 2025, in the January 2025 term (IIT M DIPLOMA AN EXAM QDD3 13 Apr 2025). It carries 2 marks.

More questions from this paper

  1. Q1Figure question
  2. Q2Figure question
  3. Q3Consider the following statements related to permutation and combination. Which of the following is/are true?
  4. Q4A surveyor collects data on the electricity bills of 100 randomly selected households in a particular month. Which of t…
  5. Q5A customer support center tracks the time agents take to resolve customer queries. Let X (in minutes) represent the res…
  6. Q6Figure question
  7. Q7A group of 7 people (A, B, C, D, E, F, G) is to be seated in a row for a photograph.\ The following conditions must be …
  8. Q8At a university, 60% of the students are enrolled in science programs, while 40% are enrolled in arts programs. Among s…
  9. Q9The total number of observations in a dataset is 8. If the mean of first 4 observations is 12 and the mean of all 8 obs…
  10. Q10A shopping mall conducted a survey among 150 customers to study the relationship between age group and preferred paymen…
  11. Q11A shopping mall conducted a survey among 150 customers to study the relationship between age group and preferred paymen…
  12. Q12The probability mass function of a discrete random variable X is given by, Based on the above data, answer the given su…
  13. Q14Let X represent the time a student takes to complete a test, which follows a uniform distribution between 45 and 75 min…
  14. Q15Given that a student has already spent 60 minutes on the test, what is the probability that they will take more than 65…
  15. Q16Find probability that the wheel lands on red exactly 2 times out of the three spins.
  16. Q17Find the value of E(X). Enter the answer correct to two decimal places.