**NPTEL Data Analytics with Python Assignment 4 Answers 2022:-** All the Answers provided here to help the students as a reference, You must submit your assignment at your own knowledge.

## What is Data Analytics with Python?

Data Analytics with Python is a fun-filled whirlwind tour of 30 hrs, covering everything you need to know to fall in love with the most sought after skoll of the 21st century. 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 careers 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 the 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 THE 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.**

COURSE NAME | ANSWER |

NPTEL Data Analytics with Python Assignment 1 Answers 2022 | Click Here |

NPTEL Data Analytics with Python Assignment 2 Answers 2022 | Click Here |

NPTEL Data Analytics with Python Assignment 3 Answers 2022 | Click Here |

NPTEL Data Analytics with Python Assignment 4 Answers 2022 | Click Here |

NPTEL Data Analytics with Python Assignment 5 Answers 2022 | Click Here |

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NPTEL Data Analytics with Python Assignment 12 Answers 2022 | NA |

## NPTEL Data Analytics with Python Assignment 4 Answers 2022

**Q1. If we have a sample size of 20 and population standard deviation is known, we will use: **

(A) t- test for hypothesis testing

(B) z-test for hypothesis testing

(C) both t and z test

(D) F-test

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**Answer:- (B) z-test for hypothesis testing **

**Q2. Null hypothesis, Ho: mu1- mu2 = 0 is a: **

(A) Upper tail test

(B) Lower tail test

(C) Two tail test

(D) F-test

**Answer:- (C) Two tail test **

**Q3. The quality-control manager at a Li-BATTERY factory needs to determine whether the mean life of a large shipment of Li-Battery is equal to the specified value of 375 hours. The process standard deviation is known to be 100 hours. A random sample of 64 batteries indicates a sample mean life of 350 hours. State the null and alternative hypotheses **

(A) Mu = 375

(B) Mu ≤ 375

(C) Mu = 350

(D) Mu ≥ 350

**Answer:- (A) Mu = 375 **

**Q4. The quality-control manager at a Li-BATTERY factory needs to determine whether the mean life of a large shipment of Li-Battery is equal to the specified value of 375 hours. The process standard deviation is known to be 100 hours. A random sample of 64 batteries indicates a sample mean life of 350 hours. At the alpha = 0.05 level of significance is there any evidence that the mean life is different from 375 hours? **

(A) Yes, there is

(B) No, there is not

(C) None of these

**Answer:- (B) No, there is not **

**Q5. For one-tailed test, the test statistic z is determined to be zero. The p-value for this test is: **

(A) Zero

(B) -0.5

(C) +0.5

(D) 1.0

**Answer:- (C) +0.5 **

**Q6. The error of rejecting a true null hypothesis is: **

(A) a Type I error

(B) a Type II error

(C) is the same as Beta

(D) committed when not enough information is available

**Answer:- (A) a Type I error **

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**Q7. The mean cost of a hotel room in a city is said to be $168 per night. A random sample of 25 hotels resulted in X-bar = $172.50 and sample standard deviation s = 15.40. Calculate the t statistic. **

(A) 2

(B) -2

(C) 1.46

(D) -1.46

**Answer:- (C) 1.46 **

**Q8. In hypothesis testing if the null hypothesis is rejected, **

(A) no conclusions can be drawn from the test

(B) the alternative hypothesis is true

(C) the data must have been accumulated incorrectly

(D) the sample size has been too small

**Answer:- (B) the alternative hypothesis is true **

**Q9. In the hypothesis testing procedure, alpha is **

(A) 1 – the level of significance

(B) the critical value

(C) the confidence level

(D) the level of significance

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**Q10. If a hypothesis is rejected at the 5% level of significance, it **

(A) will always be rejected at the 1% level

(B) will always be accepted at the 1% level

(C) will never be tested at the 1% level

(D) May be rejected or not rejected at the 1% level

**Answer:- (A) will always be rejected at the 1% level **

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**Disclaimer**:- We do not claim 100% surety of solutions, these solutions are based on our sole expertise, and by using posting these answers we are simply looking to help students as a reference, so we urge do your assignment on your own.

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**NPTEL Data Analytics with Python Assignment 4 Answers 2022:-**All the Answers provided here to help the students as a reference, You must submit your assignment at your own knowledge.

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