The lifetimes of a group of 10 light bulbs are given below: 221, 645, 538, 941, 269, 893, 703, 536, 823, 651. The standard deviation of the lifetimes is (to two decimal places)

228.78

Step-by-step explanation:

Given:

The lifetimes of a group of 10 light bulbs are 221, 645, 538, 941, 269, 893, 703, 536, 823, 651.

To find: standard deviation of the lifetimes

Solution:

Sum of observations

Number of observations (n) = 10

Mean Sum of observations/Number of observations =

Standard deviation:

Put

the answer is (-8,-5)

step-by-step explanation:

the endpoint to midpoint is half the length. the length is (-2,-1) so when you are at the midpoint just add it to it to find your answer -6+(-2)= -8 and -4+(-1)=-5 so (-8,-5)

d.) yes, because the volume of the cone is greater than the volume of the sphere

step-by-step explanation: