A group of students believes that the time taken to travel to college, T minutes can be assumed to be normally distributed. Within the college 5% of students take at least 55 minutes to travel to college and 0.1% takes less than 10 minutes. Find the mean and standard deviation of T..
Turn on thread page Beta
- Thread Starter
- 31-10-2016 09:06
- Official Rep
- 02-11-2016 10:20
Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.
Just quoting in Fox Corner so she can move the thread if needed
Spoiler:Show(Original post by Fox Corner)
(Original post by sunshinewothaya)
- 02-11-2016 20:57
Within the college 5% of students take at least 55 minutes to travel to college
0.1% takes less than 10 minutes.
Recall that . You can find z with the probabilities above, your x's are 55 and 10, and the formula I gave will let you use this data to construct a pair of simultaneous equations which will yield the mean and standard deviation.