# NPTEL Data Analytics with Python Week 4 Assignment Answers 2024

## NPTEL Data Analytics with Python Week 4 Assignment Answers 2024

1.

`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
`Answer :-  For Answer Click Here `

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 `