Check answer Please and help with #11.
Suppose houses are available for purchase during construction of a new housing development. Two different types of houses are being built: rancher and colonial. The mean price of the ranchers is $319,000 with a standard deviation of $12,000. The mean price of the colonials is $405,000 with a standard deviation of $18,500.

8. Find the combined mean price of the two different types of houses. (2 points)
$362,000

9. Find the combined standard deviation of the two different types of houses. (2 points)
$22,051.0771 or $22,051.08

Question

Check answer Please and help with #11.
Suppose houses are available for purchase during construction of a new housing development. Two different types of houses are being built: rancher and colonial. The mean price of the ranchers is $319,000 with a standard deviation of $12,000. The mean price of the colonials is $405,000 with a standard deviation of $18,500.

8. Find the combined mean price of the two different types of houses.  (2 points)
 $362,000

9. Find the combined standard deviation of the two different types of houses.  (2 points)
 $22,051.0771 or $22,051.08