Question 20 4 pt The diameter measurements of an armored electric cable, taken at n=25 points...
The diameter measurements of an armored electric cable, taken at n=25 points along the cable, gave a sample standard deviation s= 0.3 cm. Compute a 95% confidence interval for the variance of of diameter of these cables. Assume that the population distribution is normal. 0 (0.0593, 0.1560) O (0.0548, 0.1742) O (0.0531, 0.1478) O (-1.0465, 1.0465)
(10 pts) 8. Ina random sample, the diameter measurements of an armored electric cable, taken at n-25 points along the cable, gave a sample mean - 2.1 cm. Assume the standard deviation a- 0,3 cm. Estimate the true mean diameter u of the cable by a 808 confidence interval.
Test: Chapter 6 Confidence Intervals Submit Test This Question: 1 pt 16 of 20 (4 complete) This Test: 20 pts possible Use the standard normal distribution or the t-distribution to construct a 95 % confidence interval for the population mean. Justify your decision. If neither distribution can e used, explain why. Interpret the results. ning backs are shown below. Assume the yards per carry are normall per carry for In a re t season, the ulation standard eviation of the...
Nombre . Responde las siguientes preguntas A) SI P(A 6 B)-1/3 P(B)- 1/4 y P(Ay B)-1/5, halle P(A) B ) Cual es la probabilidad de lanzar un par de dados y que la suma de los resultados de los dos dados sea 7 C ) Una prueba de selección múltiple tiene cinco posibles respuestas de las cuales una es correcta, si 13 estudiantes eligen las respuestas al azar. Cuaál es la probabilidad de que los 13 escojan la respuesta correcta?...