The United States has an aging infrastructure as witnessed by several recent disasters, including the I-35 bridge failure in Minnesota. Most states inspect their bridges regularly and report their...

The United States has an aging infrastructure as witnessed by several recent disasters,
including the I-35 bridge failure in Minnesota. Most states inspect their bridges regularly and
report their condition (on a scale from 1–7) to the public. Here are the condition numbers from
a sample of 30 bridges in New York State:

5.00 5.44 6.66 5.07 6.80 5.43 4.83 4.25 4.41 4.36
7.02 5.72 4.58 6.43 3.97 4.32 6.26 6.82 5.26 5.47
4.96 6.33 4.93 5.61 4.95 7.01 5.57 3.42 5.18 4.51

Choose the correct steam-and-leaf diagram. Do any of the bridges appear to have unusually
good or poor ratings? If so, compute the mean with and without these bridges.