A company had 15 employees whose salaries are shown below. Find the standard deviation. 7500, 15500, 26400, 26400, 16000, 17,800, 7800, 8900, 15200, 20100, 11200, 18100, 23000, 14000, 9600
answer is 7971.349042822 as its a sample

Which of the following describes the symmetry of the graph of y = x3?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x