45 ! the mean of 4 data values is calculated. one of the data values is 3 above the mean. another value is 4 above the mean. a third value is 1 above the mean. what is true about the fourth value?

a) it is 8 below the mean.

b) it is 6 below the mean

c) it is equal to the mean

d) it is 2 above the mean

Name the most appropriate metric unit for each measurement like the mass of cow

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

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