ECG records how electric signals are transmitted throughout the heart and cons- ists of waves called P, Q, R, S, T and U. Let's assume that the interval between Q and T waves in a grown man, so called...

Extracted text: ECG records how electric signals are transmitted throughout the heart and cons- ists of waves called P, Q, R, S, T and U. Let's assume that the interval between Q and T waves in a grown man, so called QT-interval, is normally distributed with the mean 400 ms and standard deviation 20 ms. If a grown man is picked random and his QT interval measured, what is the probability of the interval being longer than 420 ms? b) 5% If a grown man is picked at random and his QT interval measured, what is the probability of the interval being between 400 and 420 ms? c) 5% How long needs a QT interval to be, at mininum, in order to be among the 20 % longest QT intervals in a grown man? Allf a grown man is picked at random and his QT interval measured, what is the probability of the interval being longer than 420 ms b) If a grown man is picked at random and his QT interval measured, what is the probability of the interval being between 400 than 420 ms C.) how long needs a QT interval to be, at minumum in order to be among the 20% longest QT intervals in a grown man?