NPTEL Data Analytics with Python Week 4 Assignment Answers 2024

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NPTEL Data Analytics with Python Week 4 Assignment Answers 2024

1.

NPTEL Data Analytics with Python Week 4 Assignment Answers 2024
Answer :- For Answer Click Here 

2. If we have a sample size of 15 and the population standard deviation is known, we will use:

  • t- test for hypothesis testing
  • z-test for hypothesis testing
  • both t and z test
  • F Test
Answer :-  For Answer Click Here 

3. 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 hypotheses.

  • Mu = 375
  • Mu ≤ 375
  • Mu = 350
  • Mu ≥ 350
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4. In question 3, At the alpha = 0.05 level of significance, is there any evidence that the mean life differs from 375 hours?

  • Yes, there is
  • No, there is not
  • None of the above
Answer :- 

5. In question 3, the computed p-value is:

  • 0.0456
  • 0.456
  • 0.0228
  • 0.228
Answer :- 

6. In question 3, at a 95% confidence interval, the estimate of the population mean life of the battery is:

  • 325.5 to 379.5
  • 325.5 to 374.5
  • 320.5 to 379.5
  • 320.5 to 374.5
Answer :-  For Answer Click Here 

7. The mean cost of a hotel room in a city is $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.

  • 2
  • -2
  • 1.46
  • -1.46
Answer :- 

8. At the a = 0.05 level. In question 7, the decision on the null hypothesis is:

  • Do not reject
  • reject
  • None of the above
Answer :- 

9. In the hypothesis testing procedure  refers to

  • 1 – the level of significance
  • the critical value
  • the confidence level
  • level of significance
Answer :- 

10. If a hypothesis test leads to the rejection of the null hypothesis,

  • a Type II error must have been committed
  • a Type II error may have been committed
  • a Type I error must have been committed
  • a Type I error may have been committed
Answer :-  For Answer Click Here