Math Data management Grade 12
posted by Madmazel .
10 year old kids were asked to run around the track. Their times were normally distributed with a mean of 58.3 sec. and a standard deviation of 7.1 sec.
a) What percentage of times will be less than 50 seconds?
b) What percentage of times will be between 50 and 60 seconds?
Respond to this Question
Similar Questions

Data management grad e12
The height of 16monthold seedlings are normally distributed with a mean of 31.5 cm and standard deviation of 10 cm. What is the height above which 75% of the seedlings have grown? 
math
The education department of state is interested in funding an education assistance program for 12 yearold children whose intelligence quotients lie in the bottom 5% of the population. According to national data, the IQ's of the 12 … 
Statistics
As reported in Runner's World magazine, the times of the finishers in the new york 10 km run are normally distrubted with a mean of 1.02 hours and a standard deviation of 9 minutes. Let X denote finishing time for the finishers. Then, … 
Statistics
Many times, we are required to use statistical measures to try and construct a problem. We run a program for a 10 different inputs. The times are measures in 1second intervals and none of them took 0 secs. a. Suppose the standard … 
statistics
A survey found that women's heights are normally distributed with mean 63.5 in. and standard deviation 2.3 in. The survey also found that men's heights are normally distributed with a mean 68.7 in. and a standard deviation 2.8. (a) … 
Math
Carmen and Susan are members of their schoolâ€™s running club. The length of the circular track at the school is 1/10 of a mile. In the time it takes Carmen to run 3 times around the track, Susan runs 4 times around the track. A. In … 
Algebra (Normal Distribution)
The mean of a normally distributed data set is 12, and the standard deviation is 2. ___% of the data points lies between 8 and 16. Find the percentage 
College Algrebra
Joel can run around a 1/4 mi track in 66 sec. Jason can run around the track in 60 sec.If the runners start at the same point on the track and run in opposite directions, how long will it take the runners to cover 1/4 mile? 
Math
The systolic blood pressure of 18yearold women is normally distributed with a mean of 120 mm Hg and a standard deviation of 12 mm Hg. What percentage of 18yearold women have a systolic blood pressure that is within 3 standard deviations … 
data management gr.12
There is a new water park in your neighbourhood. A rider is not allowed to get on the slide at the top until the previous rider has comletely exited at the bottom. It is known that the mean ride time for this type of slide is 24.5 …