kking

Thank you so much - I know what I did wrong now.

I put the numbers in back to front and that is why I had -0.620 as opposed to 0.620.

I really appreciate all your help and thank you for your patience and for showing me the best way to work it out,

Thank you - I really appreciate this - Can you help me with the other question because that was the most complicated one or show me the formula. 

I got the answer -0.620 but I am not confident this is correct,

In the testing phase of golf b***s, manufacturers generate robot controlled shots and analyse the results of such shots by the flight distance which is measured to a high accuracy.

It was found that the mean length of a large number of robot controlled shots using the Titleist Pro V1x golf ball is 229.424 metres and the standard deviation is 15.953 metres.Assuming that the lengths are normally distributed, find the proportion of robot controlled shots that measure between 224 and 265 metres. Supply your answer correct to three decimal places.

Thank you - I really appreciate this - Can you help me with the other question because that was the most complicated one or show me the formula. 

I got the answer -0.620 but I am not confident this is correct,

In the testing phase of golf b***s, manufacturers generate robot controlled shots and analyse the results of such shots by the flight distance which is measured to a high accuracy.

It was found that the mean length of a large number of robot controlled shots using the Titleist Pro V1x golf ball is 229.424 metres and the standard deviation is 15.953 metres.Assuming that the lengths are normally distributed, find the proportion of robot controlled shots that measure between 224 and 265 metres. Supply your answer correct to three decimal places.

Hi Alan

I still don't get quite how to use it - can you help?