Question

Question number 1 The personnel department of a large corporation wants to estimate the family dental expenses of its employees to determine the feasibility of providing a dental insurance plan. A random sample of 12 employees reveals the following family dental expenses (in dollars): 228 115 425 275 370 250 593 540 225 117 318 182 Construct a 95% confidence interval for the average family dental expenses for all employees in this corporation. Place your LOWER limit, in dollars rounded to 1 decimal place, in the first blank. Do not use a dollar sign, a comma, or any other stray mark. For example, 123.4 would be a legitimate entry Place your UPPER limit, in dollars rounded to 1 decimal place, in the second blank. Do not use a dollar sign, a comma, or any other stray mark. For example, 567.8 would be a legitimate entry Upper Limit 402.1 Lower Limit 214.2 I don't know

Answer 1

115 370 250 593 540 225 117 425 318 1829 228 115 +370 +2 SO +593+ + 228 12 3638 2 ? - 303.167 o si {(u-w)! (115-303-1673"7 (370 - 303-167)x ---+ (228-303467)" 23613.606 S: 23613.606 = 153.67 Q5.1. c.], x=0.05, D-fall, tan :2.201 C-= ģt fan Siso = 303.167+(2-2013 (153:57) i 303.167 + 97.64 lower linit = 303-167-27064 = 205.527 upper limit = 303-167 +97.645 400.807 lower limit= 205.5 upper limit = 400.8.