Question number 1

1). The personnel department of a large corporation wants to estimate the family dental expenses of its employees. A random sample of 12 employees reveals the following family dental expenses ($) for the preceding year: 15, 17, 18, 13, 14, 16, 17, 14,21, 25,19,16. Set up a 99% confidence interval estimate of the mean family dental expenses for all employees. Formula Mean Standard Dev. Critical Values C.I.E. 2). M T R Total Number of persons remember ad (A) 65 35 Number of persons not remember ad (B) 27 127 76 98 93 267 Totals 141 133 120 394