A random sample of 19 rainbow trout caught at Brainard lake,Colorado, had mean length x = 11.9 inches with sample standarddeviation o 2.8 inches.
Find a 95% confidence interval for the population mean length ofall rainbow trout in this lake.
b. interpret the meaning of the confidence interval in the contextof this problem .
A random sample of 78 students was interviewed, and 59students said that they would vote for Jennifer James as studentbody president.
a. Let p represent the proportion of all students at this collegewho will vote for Jennifer. Find a point estimate p for p.
b. Find a 98% confidence interval for p.
