Lisetta owns a firm that manufactures fire$-$safety components and wants to estimate plant capacity to schedule customer orders and improve on$-$time delivery. A random sample of ten days output gave the following results for numbers of components produced: $577,642,615,655,600,570,640,620,595,$ and $575.$ Lisetta is concerned about the variability of daily output and views as undesirable any variance above $525.$