11. They show a ragged frequency distribution around 20 kHz. 12. The Frequency distribution of North American land mammals ( n = 465 ). 13. Another brute force approach is to match up the frequency distribution of the letters. 14. It tests a null hypothesis stating that the frequency distribution of certain categorical variable. 15. Actually, fractional Fourier transform is a rotation operation on the time frequency distribution . 16. As was our expectation, the frequency distribution can be separated into two parts. 17. Several techniques can be used to move signals in the time-frequency distribution . 18. Statistical hypothesis testing is founded on the assessment of differences and similarities between frequency distributions . 19. No language has an exact letter frequency distribution , as all writers write slightly differently. 20. For those signals, WDF can exactly generate the time frequency distribution of the input signal.