Lucy is recording the percentages she earned on each quiz in her math class. Here are her results for the last 7 quizzes. $$ 74,64,90,74,92,68,71 $$ Find the range of the data set.

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To find the range of a data set, we follow these steps:

1. **Identify the maximum and minimum values** in the data set.
2. **Calculate the range** using the formula:

$$
\text{Range} = \text{Maximum} - \text{Minimum}
$$

Now, let's apply these steps to Lucy's quiz scores:

- The scores are: $$ 74, 64, 90, 74, 92, 68, 71 $$

**Step 1: Find the maximum and minimum values.**

- Maximum value: $$ 92 $$
- Minimum value: $$ 64 $$

**Step 2: Calculate the range.**

Now we can calculate the range:

$$
\text{Range} = 92 - 64
$$

Let's perform the calculation.

$$
\text{Range} = 28
$$

Thus, the range of Lucy's quiz scores is $$ 28 $$.
The range of Lucy's quiz scores is 28.

Lucy is recording the percentages she earned on each quiz in her math class. Here are her results for the last 7 quizzes. \[ 74,64,90,74,92,68,71 \] Find the range of the data set.

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