Number of cars Repaired at Jay's Motor, 2000 to 2008
5.000
4,000
Average Scores
3,000
2,000
1.000
1970
1980
1990
2000
2010
Year
According to the line of best fit in the scatter plot
above, which of the following best approximate
the year in which the number of cars repaired by
Jay's Motor was estimated to be 4,500?
A) 1996
B) 1998
C) 2000
D) 2002

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. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ 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 cm/sec upper limit cm/sec