Question

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. Assume the number of farms in the sample is

78

​(a) Use the empirical rule to estimate the number of farms whose land and building values per acre are between

​$1500

and

​$1900

nothing

farms ​(Round to the nearest whole number as​ needed.) ​(b) If

21

additional farms were​ sampled, about how many of these additional farms would you expect to have land and building values between

​$1500

per acre and

​$1900

per​ acre?

nothing

farms out of

21

​(Round to the nearest whole number as​ needed.)

Answer 1

a)

b)

If 21 additional farms were​ sampled

0.95*21 = 19.95 = 20