3. We have annual data, from 1963 until 1972, about the amount of money in a country \( (M t) \) and the national income \( (Y t) \), in million Euros that can be summarized in the following: \( \sum M_{t}=37.2 \quad \sum M_{t}^{2}=147.18 \quad \sum M_{t} Y_{t}=295.95 \) \[ \sum Y_{t}=75.5 \quad \sum Y_{t}^{2}=597.95 \] a- Could you specify a linear regression model representing the theory that states that the national income is determined by the amount of money in a country? b- Think about possible factors contained in error \( \left(u_{i}\right) \) of your econometric specification representing the above theory. c- Find the OLS estimated values for the parameters of your econometric model and interpret your results.

La duración en horas de cierta marca de bombillos se ajusta a una distribución N(48000, 3000), La duraciōn de los bombillos en un intervalo de confianza del \( 80 \% \) está:

Una prueba Psicológica a estudiántes de primer semestre de ingreso a la universidad se obturo como resultado un puntaje con media de 150 y desviación estándar de 25 puntos. ¿Cual es el porcentaje de alumnos que sacaron puntaje entre 115 y 140 ?

Question 59 The city of Raleigh has 11,400 registered voters. There are two candidates for city council in an upcoming election: Brown and Feliz. The day before the election, a telephone poll of 550 randomly selected registered voters was conducted. 247 said they'd vote for Brown, 284 said they'd vote for Feliz, and 19 were undecided. Use this information from the sample to complete the following statements about the population of all registered voters in Raleigh. Round your answers to the nearest person. Based on this sample, we could expect Based on this sample, we could expect Based on this sample,

\begin{tabular}{l} Tiempo restante 1:08:08 \\ \hline Una prueba Psicológica a estudiantes de primer semestre de ingreso a la universidad se obtuvo como resultado un puntaje \\ con media de 150 y desviación estándar de 25 puntos. \\ ¿Cual es el porcentaje de alumnos que sacaron al menos 120 puntos? \end{tabular}

MAT 141 Cumulative Final Exam - Chapters \( 1-12 \) Score: \( 26.3 / 111 \) Answered: \( 16 / 75 \) The city of Raleigh has 11,900 registered voters. There are two candidates for city council in an upcoming election: Brown and Feliz. The day before the election, a telephone poll of 250 randomly selected registered voters was conducted. 146 said they'd vote for Brown, 87 said they'd vote for Feliz, and 17 were undecided. Use this information from the sample to complete the following statements about the population of all registered voters in Raleigh. Round your answers to the nearest person. Based on this sample, we could expect \( \square \) of the 11,900 registered voters to vote for Brown. Based on this sample, we could expect \( \square \) of the 11,900 registered voters to vote for Feliz. Based on this sample, \( \square 11,900 \) registered voters are still undecided.