Varatta Enterprises sells industrial plumbing valves. The following table lists the annual sales amounts for the different salespeople in the organization for the most recent fiscal year.

Click on the datafile logo to reference the data.

Salesperson	Sales Amount ($1000)	Salesperson	Sales Amount ($1000)
Joseph	125	Wei	468
Jennifer	244	Samantha	415
Phillip	576	Erin	235
Stanley	318	Dominic	323
Luke	264	Charlie	186
Lexie	179	Amol	211
Margaret	355	Lenisa	431

a. Compute the mean, variance, and standard deviation for these annual sales values. Round your answers to the nearest whole number.

Mean
Variance
Standard deviation

b. In the previous fiscal year, the average annual sales amount was with a standard deviation of . Discuss any differences you observe between the annual sales amount in the most recent and previous fiscal years.

(i) The difference in the mean annual sales amount is very small and is most likely due to random change in demand for these products.

(ii) The sample mean annual sales amount and standard deviation for the previous fiscal year were significantly higher.

(iii) The sample mean annual sales amount and standard deviation for the previous fiscal year were significantly lower.

Choose the correct option.

- Select your answer -Choice (i)Choice (ii)Choice (iii)Item 4