the mean value of land and buildings per acre from a sample of farms is $1200 with standard deviation of $100.The data has a bell shaped distribution. Using the empircial rule, determaine which of the following farms, whose land and bulidng values per acre are given, are ususal (more than two standard devitations from the mean).Are any of the data values very unsusal (more than three standard deviations form the mean)? $1215 $1409 $1128 $863 $1283 $1035