A species of bird is approximately normally distributed with mean height of 80cm and standard dev....
A species of bird is approximately normally distributed with mean height of 80cm and standard dev. of 5cm.
A. What proportion of these birds are taller than 86.5 cm?
B. In a random sample of 6 birds, what is the probability that the average height is greater than 86 cm?
C. What is the minimum height for the top 15% of birds?
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A species of bird is approximately normally distributed with
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Amplitude=3;
fs=8000;
n=0:399;
t=0:1/fs: n*1/fs-1/fs;
signal=3+3*cos(2*pi*1100*t)+3*cos(2*pi*2200*t)+3*cos(2*pi*3300*t);
fftSignal= fft(signal);
fftSignal=f ftshift (fftSignal);
f=fs/2*linspace(-1,1,fs);
plot(f,abs(fftsignal);
xlabel('Frequency(Hz)’)
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