The mean value of land and buildings per acre from a sample of farms is $1400, with a standard deviation of $200. The data set has a bell-shaped distribution. Assume the number of farms in the sample is 74. Answer this:

(a) Use the empirical rule to estimate the number of farms whose land and building values per acre are between $1200 and $1600.

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

(b) If 27 additional farms were sampled, about how many of these additional farms would you expect to have land and building values between $1200 per acre and $1600 per acre?

farms out of 27 (Round to the nearest whole number as needed.)

dont understand

step-by-step explanation:

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v