Joe is measuring the time it takes for a ball to roll down a ramp. in this experiment joe takes the measurement 5 times and gets the following results: 24.8, 23.9, 26.1, 25.1, 24.5 seconds. joe uses the standard deviation of these numbers as the "margin of error" on his measurement. does joe's average time agree with the accepted value of 25.9 seconds, within his margin of error? can anyone me with this?

 Step by step solution :

standard deviation is given by :

where, is standard deviation

is mean of given data

n is number of observations

From the above data,

Now, if , then

If  , then

if , then

If , then

If , then

so,

No, Joe's value does not agree with the accepted value of 25.9 seconds. This shows a lots of errors.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !