Question

The number of patients treated at Dr. Jason’s dentist office each day for nine days is 4, 4, 5, 4, 4, 5, 5, 5, 4. Find the mean, median, mode, and range of the data. If necessary, round to the nearest tenth.

A 4.4, 4, 4, 9

B 4, 2.4, 4, 1

C 4.4, 4, 4, 1

D 2.4, 4, 4, 9
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I think it's C

Answer 1

The mean of a set of data values is the sum of all of the data values divided by the number of data values.

`\overline{x}=(4+4+5+4+4+5+5+5+4)/(9)=(40)/(9)\approx4.4`

The median of a set of data values is the middle value of the data set when it has been arranged in ascending order.

`4,\ 4,\ 4,\ 4,\ \boxed{4},\ 5,\ 5,\ 5,\ 5\\\\Median=4`

The mode of a set of data values is the value(s) that occurs most often.

`\underbrace{4,\ 4,\ 4,\ 4,\ 4}_(5),\underbrace{5,\ 5,\ 5,\ 5}_(4)\\\\Mode=4`

The range of a set of data is the difference between the highest and lowest values in the set.

`5-4=1\\\\Range=1`

Answer: C. 4.4, 4, 4, 1