A student determines the density of a chunk of metal to be 5.1 g/cm3. She then repeats the measurement four more times on the same chunk of metal and obtains values of 5.0, 4.9, 5.4, and 5.2 g/cm3 for the density. What is the standard deviation of the five measurements? A. 0.148
B. 0.19
C. 0.037
D. 0.22
E. 0.17

E. 0.17

Step-by-step explanation:

Mean:

Sum of all values divided by the number of values, so:

Standard deviation:

Square root of the sum of the difference squared between each value and the mean, divided by the sample size, so:

Thus the correct answer is given by option E.

answer: 1 and 3

step-by-step explanation:

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.