olek
Popular questions and responses by olek
maths
The distribution of the time taken to run 1000 metres by users of a treadmill in a sports centre has mean 7.2 minutes and standard deviation 2.045 minutes. 1 Choose the option that is closest to the probability that the mean time taken to run 1000 metres
asked on May 8, 2011 
maths
give the solution of the initialvalue problem dy/dx=(1+2cos^2(x))/y, (y > 0), y= 1 when x = 0. Thanks.
asked on May 13, 2011 
maths
give the solution of the initialvalue problem dx/dy=(1+2cos^2(x))/y, (y > 0), y= 1 when x = 0. Thanks.
asked on May 12, 2011 
maths
The function f is given by ln(e^x − e ^−x) (x > 0). By applying in turn the Composite and Quotient Rules, calculate that gives an expression for each of the following. 1. f!(x) 2. f!!(x)
asked on May 12, 2011 
maths
The distribution of the time taken to run 1000 metres by users of a treadmill in a sports centre has mean 7.2 minutes and standard deviation 2.045 minutes. 1 Choose the option that is closest to the probability that the mean time taken to run 1000 metres
asked on May 8, 2011 
maths
The number of vehicles entering each of 15 junctions from a motorway during a 20minute period on a Sunday morning is given below. 7 26 30 26 19 22 12 30 8 28 8 15 26 32 4 1 Choose the option that gives the median number of vehicles entering a junction.
asked on May 8, 2011 
maths
A psychological test was given to 92 teenage boys and 68 teenage girls. The test was used to assign a score to each teenager, measured on the ‘worry scale’–0(not worried) to 100 (very worried).A summary of the results is given in the table below.
asked on May 8, 2011 
maths
A sample of 25users of a gym had their oxygen consumption measured for 30 minutes after arunning exercise.The sample mean and sample standard deviation of the oxygen consumption,in millilitres per kilogram of body weight per minute, were 24.1 and 18.7,
asked on May 8, 2011 
maths
The heights in centimetres of men in a sample selected at random may be modelled by a normal distribution with mean 180.5 and standard deviation 11.3. 1 Choose the option that is closest to the value above which 30% of the heights of men will lie. Options
asked on May 8, 2011

maths
does it mean that: 1. is D 2. is E 3. is B ? Regards.
posted on May 8, 2011