Abortion is a controversial topic. Most people in the US bel…

Abortion is a controversial topic. Most people in the US believe abortion should be legal at least under some conditions, but 20% of Americans believe it should be illegal under all circumstances. Suppose we survey a simple random sample of 100 American adults and compute the proportion in the sample who believe abortion should be illegal under all circumstances. Could we use the Z table to find probabilities about the sample proportion of successes? [useZ] Find the probability that p-hat is greater than 0.25. [compute-prob]

The pandemic has affected many aspects of our lives, includi…

The pandemic has affected many aspects of our lives, including manufacturing and delivery of many products. New cars use semiconductor chips, which are now in very short supply, causing the production of new cars to slow down and the prices to go up. Data collected on sale prices of new cars in the US during September 2021 was used to construct a 95% CI for

Most people these days own a smart phone, with iPhones being…

Most people these days own a smart phone, with iPhones being the most popular. How popular exactly? A study finds that, out of 146 UF students who do have a smart phone, 137 have an iPhone. If we want to construct a 95% confidence interval for the true proportion of UF students who own an iPhone, what should we use for our estimator?

¿Qué hicieron estas personas?  Completa el párrafo con la fo…

¿Qué hicieron estas personas?  Completa el párrafo con la forma correcta del pretérito del verbo entre paréntesis. Hoy yo (volver) _______ de la universidad a la una de la tarde. Me (hacer) _______ un sandwich y lo (comer) _______ delante de la televisión. Cuando (terminar) _______ , (empezar) _______ a meter la ropa sucia en la lavadora. Antes de salir para el trabajo, le (dar) _______ comida al perro. Por la mañana (ir) _______ a la clase de música, pero llegué tarde porque (acostarse) _______ a las 2 a.m. Atentamente, Raúl Bustamante