Numerade

Questions asked

BEST MATCH

A researcher is interested in knowing whether individuals whose parents are married have happier marriages themselves than individuals whose parents are divorced. The researcher recruits 20 married individuals with divorced parents and 20 married individuals with married parents. Then, the researcher measures marriage satisfaction for everyone in the sample. How would you classify this research design? Group of answer choices Correlational Experimental Nonexperimental Repeated measures

View Answer

BEST MATCH

Which answer corresponds to the fastest reaction rate? Multiple Choice $$E_a = 1 kcal$$ $$E_a = 10 kcal$$ $$E_a = 100 kcal$$ Reaction rate is independent of $$E_a$$ value.

View Answer

BEST MATCH

3. Following Fig.1(a) is a typical spectrum for a raised-cosine pulse. It is given as $$ \frac{1}{T_b}P(f) = \begin{cases} 1 & |f| < \frac{R_b}{2} \\ \frac{1}{2} \left[ 1 + \cos \left( \frac{\pi(|f| - \frac{R_b}{2})}{\alpha R_b} \right) \right] & \frac{R_b}{2} < |f| < \frac{R_b}{2} + \frac{\alpha R_b}{2} \\ 0 & |f| > \frac{R_b}{2} + \frac{\alpha R_b}{2} \end{cases} $$ Its inverse Fourier transform is $$ p(t) = R_b \frac{\cos(\pi \alpha R_b t)}{1 - 4\alpha^2 R_b^2 t^2} \text{sinc}(R_b t) $$ where $\alpha$ is the roll-off factor. (a) State frequency domain Nyquist criteria for ISI free transmission. From the shape of $P(f)$ given in Fig.1(b), explain at what pulse rate ($R_b$) and pulse duration ($T_b$) this pulse would satisfy Nyquist's criteria. (b) Based on part (a), determine the roll-off factor $\alpha$. (c) State time domain ISI free criteria. Using expression of $p(t)$ to show if the pulse in Fig. 1(b) satisfies time domain ISI free transmission. (d) Based on part (c), show how rapidly the pulse decays as a function of $t$. (e) If the channel transmission bandwidth is restricted to 1.2 Mhz; 8-ary PAM signalling (8 PAM levels signalling) and the pulse in Fig. 1(b) are used. Determine the maximum transmission data rate in terms of bits per second.

View Answer

BEST MATCH

Which of the following statements is true about vasectomy?Group of answer choicesIt is recommended as a temporary or reversible procedure.It is not recommended as a temporary or reversible procedure.It affects a man's ability to achieve orgasm, ejaculate, or achieve erections.It is a surgery in which the vas deferens are tied off but not cut apart.

View Answer

BEST MATCH

In the case of conjoined twins Jodie and Marie, the girls' parents did not wish to separate them, even if it meant both might die. Question 1 options: True False

View Answer

BEST MATCH

What are the four types of observer roles in field research pleases an example to discuss each of them

View Answer

BEST MATCH

? Part D Br Br Spell out the full name of the compound. ? View Available Hint(s) Submit ? Part E CH$_2$CH$_3$ HC\=CCH$_2$CCH$_3$ CH$_3$ Spell out the full name of the compound. ? View Available Hint(s) Submit

View Answer

BEST MATCH

Risk classes and RADR Moses Manufacturing is attempting to select the best of three mutually exclusive projects, X, Y, and Z. Although all the projects have 5-year lives, they possess differing degrees of risk. Project X is in class V, the highest-risk class; project Y is in class II, the below-average-risk dass, and project Z is in class III, the average-risk class. The basic cash flow data for each project and the risk dasses and risk-adjusted discount rales (RADRs) used by the firm are shown in the following tables a. Find the risk-adjusted NPV for each project. b. Which project, if any, would you recommend that the firm undertake? The net present value for project X is S (Round to the nearest cent) 1 Data Table X Enter your answer in the answer box and then click Check Answer. parts 3 remaining (Click on the icon located on the top-right corner of the data table below in order to copy its contents into a spreadsheet) Initial investment (CFO) Year (1) Project X Project Y Project Z $178.000 $237,000 $313,000 Cash inflows (CF$_t$) $80.000 $60,000 $88.000 73.000 70,000 88,000 60,000 71,000 88,000 63,000 80,000 88,000 65.000 99,000 88.000 Risk Class Description Risk Classes and RADRs Risk adjusted discount rate (RADR) Lowest risk 10.4% Below-average risk 13.3 Average risk 15.4 IV Above average risk 19.5 Highest risk 22.4 Print Done Clear All Check Answer

View Answer

BEST MATCH

Assume there is a substantial rightward shift of the AS curve. The corresponding change in the equilibrium in position in the Phillips curve graph would be ? down, left ? up, left ? down, right ? up, right

View Answer

BEST MATCH

where $\theta$ is a uniformly distributed random phase and $\Omega > a$. (a) Define a WSS RP. (b) Define a strict-sense stationary RP. (c) Define a realizable linear system. (d) Is the following an autocorrelation function? $\psi(\tau) = \begin{cases} 1 - |\tau|, & |\tau| < 1, \\ 0 & \text{otherwise.} \end{cases}$ Explain. 4.10 Assume $X(t)$ is a stationary RP with autocorrelation function $\psi_x(\tau) = \begin{cases} 1 - |\tau|, & -1 \le \tau \le 1, \\ 0 & \text{otherwise.} \end{cases}$ 162 Find the spectral density $\Psi_y(\omega)$ for RANDOM PROCESSES $y(t) = x(t)\cos(\omega_0 t + \lambda)$ when $\omega_0$ is a constant and $\lambda$ is an RV uniformly distributed on the interval $[0, 2\pi]$. 4.11 An RP $X(t)$ is defined by $x(t) = \cos(t + \theta),$ where $\theta$ is an RV uniformly distributed on the interval $[0, 2\pi]$. Calculate the autocorrelation function $\psi_{xx}(\tau, s)$ for $y(t) = \int_0^t x(u) du.$ 4.12 Let $\psi_1$ and $\psi_2$ be two arbitrary continuous, absolutely integrable autocorrela- tion functions. Are the following necessarily autocorrelation functions? Briefly explain your answer. (a) $\psi_1 \cdot \psi_2$. (b) $\psi_1 + \psi_2$. (c) $\psi_1 - \psi_2$. (d) $\psi_1 * \psi_2$ (the convolution of $\psi_1$ with $\psi_2$).

View Answer

leslie c.