1. How do rented housing units differ from units occupied by their owners? Here

Question

1. How do rented housing units differ from units occupied by their owners? Here are the distributions of the number of rooms for owner-occupied units and renter-occupied units in a certain city:

places.)

2. A mechanical assembly consists of a rod with a bearing on each end. The three parts are manufactured independently, and all vary a bit from part to part. The length of the rod has mean 22 centimeters (cm) and standard deviation 0.14 millimeters (mm). The length of a bearing has mean 2 cm and standard deviation 0.04 mm. What are the mean and standard deviation of the total length of the assembly? (Round your standard deviation answer to four decimal places.)

How do rented housing units differ from units occupied by their owners? Here are the distributions of the number of rooms for owner-occupied units and renter- occupied units in a certain city: Rooms12 3 45 Owned 0.003 0.002 0.023 0.104 0.210 Rented 0.008 0.027 0.288 0.363 0.163 Rooms 678 9 10 Owned 0.224 0.197 0.149 0.053 0.035 Rented 0.093 0.039 0.013 0.003 0.003

Explanation / Answer

from above data:

std deviation for:

owner occupied = 0.089

renter occupied =0.130

2)

mean =22+2+2=26

std deviation =(0.142+2*0.042)1/2 =0.1510

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