Question

wednesday: pca: find the mean, median, mo
100, 20, 80, 20, 100, 50, 100, 70, 200
thursday: no school
friday: no school

Explanation:

Step1: Find the Mean

To find the mean, we sum all the numbers and divide by the count of numbers. The numbers are \(100, 20, 80, 20, 100, 50, 100, 70, 200\). First, sum them: \(100 + 20 + 80 + 20 + 100 + 50 + 100 + 70 + 200 = 740\). There are 9 numbers, so the mean is \(\frac{740}{9} \approx 82.22\).

Step2: Find the Median

Arrange the numbers in ascending order: \(20, 20, 50, 70, 80, 100, 100, 100, 200\). There are 9 numbers (odd count), so the median is the middle number, which is the 5th number. The 5th number is \(80\).

Step3: Find the Mode

The mode is the number that appears most frequently. Looking at the ordered list: \(20\) appears 2 times, \(100\) appears 3 times, others appear once. So the mode is \(100\).

Answer:

Mean: \(\approx 82.22\), Median: \(80\), Mode: \(100\)