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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 me 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 one wind speed readings gave an average velocity of x 1075 cm sec Based on long term experience a can be assumed to be 245 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 Xcm sec upper limit Xcm sec 1012 89 1137 11 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 O Yes 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 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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