At 1 p.m., a meteorologist records the temperatures of seven locations. One hour later, the temperature of

Question:

At 1 p.m., a meteorologist records the temperatures of seven locations. One hour later, the temperature of the coldest location is 1°F less, the temperature of the hottest location is 2°F more, and the temperatures of the other locations stayed the same.
a. Did the range of the temperatures decrease, increase, or stay the same over the one-hour period? Explain.
b. Did the IQR of the temperatures decrease, increase, or stay the same over the one-hour period? Explain.