A developer believes that about \( 72 \% \) of homes in a town have a mortgage. A survey is done and she finds that 822 have mortgages while 321 do not. She knows the critical value is -1,81 The null hypothesis direction Blank 1 L for Left, R for Right, 2 for 2-tailed The 3-decimal alpha value Blank 2 The test statistic Blank 3 The p-value Blank 4

Which of the following are properties of the Student's t-distribution? Select all that apply. \( \square \) A. The t-distribution is the same for different degrees of freedom. B. The area under the t-distribution curve is 1 . \( \square \) C. The area in the tails of the t-distribution is slightly greater than the area in the tails of the standard normal distribution. \( \square \) D. The t-distribution is centered at \( \mu \). E. the sample size \( n \) increases, the density curve of \( t \) gets closer to the standard normal density curve.

Suponga que está evaluando la precisión de un pronóstico de demanda de productos en una fábrica. El pronóstico inicial y los datos reales son los siguientes: Pronóstico: \( [100,150,200,250] \) Datos reales: \( [90,160,210,240] \). ¿Cuál es la desviación absoluta media DAM de este pronóstico?

Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 16, upper bound is 28 . The point estimate of the population mean is

Laura es una gerente de inventarios que quiere evaluar la precisión de su modelo de pronóstico para la demanda semanal de un producto. Para ello, calcula el Error Porcentual Absoluto Medio (MAPE) de los pronósticos realizad durante las últimas cinco semanas. Los valores reales y los valores pronosticados de la demanda (en unidades) son siguientes:

Fill in the blank in the statement below. The procedure for constructing a confidence interval about a mean is ___ which means minor departures from normality do not affect the acc The procedure for constructing a confidence interval about a mean is which means minor departures from normality do not affect the