At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. Wind speeds be

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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 x = 1075 cm/sec. Based on long-term
experience, 𝜎 can be assumed to be 275 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 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.