Question

a professor had students keep track of their social interactions for a week. the number of social interactions over the week is shown in the following grouped frequency distribution. how many students had at least 45 social interaction for the week? the number of students was (type a whole number.)

Explanation:

To find the number of students with at least 45 social interactions, we need to sum the frequencies of the classes 45 - 49, 50 - 54, 55 - 59, and 60 - 64.

Step 1: Identify the relevant classes and their frequencies

• Class 45 - 49: Frequency = 9
• Class 50 - 54: Frequency = 4
• Class 55 - 59: Frequency = 6
• Class 60 - 64: Frequency = 2

Step 2: Sum the frequencies

$$ 9 + 4 + 6 + 2 = 21 $$

Answer:

21