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2. Mcdonald's Dinner Service Times Refer to the accompanying frequency distribution. What problem would be created by using classes of 60-120, 120-180, . . ., 300-360? 3. Relative Frequency Distribution Use percentages to construct the relative frequency dis- tribution corresponding to the accompanying frequency distribution for Mcdonald's dinner service times. 4. What's Wrong? Heights of adult males are known to have a normal distribution, as de- scribed in this section. A researcher claims to have randomly selected adult males and mea- sured their heights with the resulting relative frequency distribution as shown here. Identify two major flaws with these results