Use a calculator to find the mean and standard deviation of the data. Round to the nearest tenth.

Question

6,7,19,7,18,7

A. mean = 9; standard deviation = 26.4
B. mean = 11.9; standard deviation = 26.4
C. mean = 10.6; standard deviation = 6.1
D. mean = 9; standard deviation = 5.1

For the mean I got 48.2 ,could you help me solve this step by step?

Answer 1

the mean is when you add up all of the numbers and divide the sum by how many numbers are given.

6+7+19+7+18+7= 64

there were 6 numbers given, so now we divide:

64/6= 10.66666667

which rounded out is 10.6, therefore, your answer is C :)

Answer 2

The mean is the average, so that is when you add all the numbers together and the divide that sum by the number of numbers you had. So, 6+7+19+7+18+7= 64. And you have 6 numbers, then divide 64/6= 10.6666, which is about 10.6. So the answer C!
Hope it helped :)

Answer 3

Also, when I took this course, my teacher told me to go to google and use a standard deviation calculator to find the standard deviation.
You just type in the number sequence and I got:
6.08824003031
which rounded out is 6.1

Answer 4

thank you!!