The mean value of land and buildings per acre from a sample of farms is $1700, with a standard deviation of $100. The data set has a bell-shaped distribution. The number of farms in the sample is 70.
1. Using the emperical rule to estimate the bunber of farms whose land and building values per acre between $1500 and $1900.
2. If 23 additional farms were sampled about how many of these farms would you expect to have land and building values between $1500 per acre and $1900 per acre.