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A Poisson distribution is used to describe radioactive decay




A nerve action potential should probably be considered as discontinuous as it moves very rapidly between the two states of polarization and depolarization.

, , , .. .

-Is the ECG/EKG a periodic signal

?

The ECG/EKG is periodic, although the R-R interval is not strictly constant.

, R-R .

-Is the equation for a straight line a polynomial

?

Yes, a straight line is a first-order polynomial.

, - .

-Does a triangular waveform have finite harmonics at all multiples of the fundamental frequency

, ?

No, a triangular waveform has a fundamental and odd harmonics

, .

-What is the result of carrying out a Fourier transform on a rectangular impulse in time

?

You obtain a frequency spectrum of the form sin(t)/t if you carry out a Fourier transform on a rectangular impulse.

sin(t)/t .

-Is the variance of a data set equal to the square root of the standard deviation

?

No, the variance is equal to the square of the standard deviation

, .

-how are power and amplitude related

?

Power is proportional to the square of amplitude.

.

-What is an autocorrelation function and where is its maximum value

?

The autocorrelation function is produced by integrating the product of a signal and a time-shifted version of the signal. The maximum value is at zero time delay

. .

-Is an EMG signal periodic

?

An EMG signal is not periodic. It is the summation of many muscle action potentials which are

Asynchronous

. , .

-What conclusion could you draw if the mean, mode and median values of a distribution were all the same

, ?

The distribution must be symmetrical if the mean, mode and median are the same

,

-What type of statistical distribution describes radioactive decay

?

A Poisson distribution is used to describe radioactive decay.

-If the number of false positives in a test for a diseases is 12 out of 48 results then what is the sensitivity of the test

12 48 , ?

- The sensitivity would be 1 − 12 / 48 = 0. 75

1 - 12/48 = 0,75

-If we carried out 10 different tests on a group of patients then would we change the chance of getting an abnormal result compared with just making one test

10 , , ?





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