help with part C MATH 1330 POD. #8: CHAPTER 8 ESTIMATION NAME 2017 October 31, 2
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help with part C
MATH 1330 POD. #8: CHAPTER 8 ESTIMATION NAME 2017 October 31, 2016 Answer Problem 2. Battery Life; the following data represent the battery life, in hours, for a random sample of 10 full charges on a fifth generation I-pod 17 12.9 10.8 =9, 7.3 10.2 12.1 6.6 10.2 9.0 8.5 7.1 (a) Check the skew-measure or prepare a box plot. Does this graph show that this data set satisfy the conditions for constructing a confidence interval about the mean? 9.47(1.933)( b) 18.23, lo.7l) | (b) Construct a 90% confidence interval for the mean number of hours the battery will 8. 23.10.7 ! last in this type of I-pod (c) Suppose you wanted additional accuracy. What can be done to increase the accuracy of the interval without changing the level of confidence? ho hodhu can he an indication of cell breakdown. This may haExplanation / Answer
Part C:
To make confidence interval more accurate without changing the confidence level you can increase the sample size.
Margin of error of confidence interval is inversely proportional to the sample size ,it means as sample size increases then margin of error decreases.
It makes your width of confidence interval narrower... It means more accurate.
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