Final answer:
The percentage of people who scored lower than a person with a z-score of -2.20 is approximately 1.34%.
Step-by-step explanation:
A z-score is a measure of how many standard deviations an individual data point is from the mean. A z-score of -2.20 indicates that the data point is 2.20 standard deviations below the mean. To find the percentage of people who scored lower, we can use a standard normal distribution table or a calculator. From the standard normal distribution table, a z-score of -2.20 corresponds to approximately 1.34%.
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