Question

a librarian wants to determine how often local families use the librarys tutoring service. he asks several volunteers to randomly survey people at the library about the number of times their family used the service in the past month. here are the data for one volunteer: 20 4 0 2 0 0 3 16 0 10 what is the mean number of times families in this survey used the service?

Explanation:

Step1: Sum all the data values

We add up all the numbers: \(20 + 4 + 0 + 2 + 0 + 0 + 3 + 16 + 0 + 10\)
First, calculate step by step: \(20+4 = 24\), \(24 + 0 = 24\), \(24+2 = 26\), \(26+0 = 26\), \(26+0 = 26\), \(26+3 = 29\), \(29+16 = 45\), \(45+0 = 45\), \(45+10 = 55\)

Step2: Count the number of data points

There are 10 data points (since we have 10 numbers: 20, 4, 0, 2, 0, 0, 3, 16, 0, 10).

Step3: Calculate the mean

The mean is the sum of the data divided by the number of data points. So we do \(\frac{55}{10}=5.5\)

Answer:

\(5.5\)