Regression coefficients are indicators of the impact of independent variables on dependent variables.

中国大学MOOC: The particular integral is obtained by an application of ___________ the method of undetermined coefficients.

Stocks with low beta coefficients have higher required rates of return.

Stocks<br/>with low beta coefficients have higher required rates of return.<br/>()

Stocks with low beta coefficients have higher required rates of return. A: 正确 B: 错误

In the basic structures of IIR filter，which structures are more sensitive to the quantization effect of coefficients？ A: The direct-form I structure. B: The direct-form II structure. C: The cascade-form structure. D: The parallel-form structure.

Which one is right about wavelet transforms? A: Wavelet transforms store large fractions of the strongest of the wavelet coefficients. B: Wavelet transforms are completely different from discrete Fourier transform (DFT). C: Each transform has 2 functions: smoothing, difference. D: Wavelet transforms means applying to pairs of data, resulting in two set of data of length L.

Which one is right about wavelet transforms? A: Wavelet transforms store large fractions of the strongest of the wavelet coefficients. B: The DWT decomposes each segment of time series via the successive use of low-pass and high-pass filtering at appropriate levels. C: Wavelet transforms can be used for reducing data and smoothing data. D: Wavelet transforms means applying to pairs of data, resulting in two set of data of the same length.