An experiment to investigate the survival time in hours of an electronic component consists of placing the parts in a test cell and running them under elevated temperature conditions. Six samples were tested with the following resulting failure times (in hours): 34, 40, 46, 49, 61, 64. (a)Calculate the sample mean and sample standard deviation of the failure time.

The sample mean of failure time was of 49 hours.

The standard deviation of the failure time was of 11.7 hours.

Step-by-step explanation:

Sample mean:

Sum of all values divided by the number of values. So

The sample mean of failure time was of 49 hours.

Standard deviation:

Square root of the division between the sum of the differences squared betweene each value and the mean, divided by the sample size subtracted by 1. So

The standard deviation of the failure time was of 11.7 hours.

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here

the answer is y = 11.54

hope this : )