Una muestra de 16 niñas de 10 años pesan en promedio 71.5, con una desviación estándar de 12 libras. Considere el calculo de intervalos de confianza de 90,95 y 99 por ciento para Ia media (µ).

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)