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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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![At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. Wind speeds below 1000 cm/sec deposit sand, and wind speeds above 1000 cm/sec move sand to new locations. The cyclic nature of wind and moving sand determines the shape and location of large dunes. At a test site, the prevailing direction of the wind did not change noticeably. However, the velocity did change. Sixty-five wind speed readings gave an average velocity of \(\overline{X} = 1075\) cm/sec. Based on long-term experience, \(\sigma\) can be assumed to be 260 cm/sec.
(a) Find a 95% confidence interval for the population mean wind speed at this site. (Round your answers to the nearest whole number.)
- lower limit: [ ] cm/sec
- upper limit: [ ] cm/sec
(b) Does the confidence interval indicate that the population mean wind speed is such that the sand is always moving at this site? Explain.
- [ ] No. This interval indicates that the population mean wind speed is such that the sand may not always be moving at this site.
- [ ] Yes. This interval indicates that the population mean wind speed is such that the sand is always moving at this site.
- [ ] Yes. This interval indicates that the population mean wind speed is such that the sand may not always be moving at this site.
- [ ] No. This interval indicates that the population mean wind speed is such that the sand is always moving at this site.](https://content.bartleby.com/qna-images/question/80d12b27-2476-49ce-98fb-3e23c71be9c7/93ff83ef-0ee8-45db-812d-adc14fb2f5e3/qfj8erc_thumbnail.png)
Transcribed Image Text:At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. Wind speeds below 1000 cm/sec deposit sand, and wind speeds above 1000 cm/sec move sand to new locations. The cyclic nature of wind and moving sand determines the shape and location of large dunes. At a test site, the prevailing direction of the wind did not change noticeably. However, the velocity did change. Sixty-five wind speed readings gave an average velocity of \(\overline{X} = 1075\) cm/sec. Based on long-term experience, \(\sigma\) can be assumed to be 260 cm/sec.
(a) Find a 95% confidence interval for the population mean wind speed at this site. (Round your answers to the nearest whole number.)
- lower limit: [ ] cm/sec
- upper limit: [ ] cm/sec
(b) Does the confidence interval indicate that the population mean wind speed is such that the sand is always moving at this site? Explain.
- [ ] No. This interval indicates that the population mean wind speed is such that the sand may not always be moving at this site.
- [ ] Yes. This interval indicates that the population mean wind speed is such that the sand is always moving at this site.
- [ ] Yes. This interval indicates that the population mean wind speed is such that the sand may not always be moving at this site.
- [ ] No. This interval indicates that the population mean wind speed is such that the sand is always moving at this site.
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