the mean value of land and buildings per acre from a sample of farms is $1500 with a standard deviation of $200 the data set has a bell shaped...

the mean value of land and buildings per acre from a sample of farms is $1500 with a standard deviation of $200 the data set has a bell shaped distribution. assume the number of farms in the sample is 73

(a) use the empirical rule to estimate the number of farms whose land and building values per acre are between $1100 and $1900

(b) if 23 additional farms were sampled about how many of these additional farms would you expect to have land and building values between $1100 per acre and $1900 per acre