Varatta Enterprises sells industrial plumbing valves. The following table lists the annual sales amounts for a portion of the salespeople in the organization for the most recent fiscal year. Click on the datafile logo to reference the data. DATA file Salesperson Sales Amount ($1000) Salesperson Sales Amount ($1000) Joseph 118 Wei 470 Jennifer 235 Samantha 413 Phillip 566 Erin 241 Stanley 315 Dominic 316 Luke 259 Charlie 188 Lexie 185 Amol 217 Margaret 343 Lenisa 429 a. Compute the mean (in $1000), variance (in $10002), and standard deviation (in $1000) for these annual sales values. Round your answers to the nearest whole number. Mean $ thousand Variance thousand Standard deviation thousand b. In the previous fiscal year, the average annual sales amount was $289 thousand with a standard deviation of $95 thousand. 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