A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x=121.2 and the sample standard deviation is found to be s=12.2. Construct a 99% confidence interval for the population mean. The lower bound is nothing . (Round to two decimal places as needed.)

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

What 8/12+8/11 in another way than and improper fraction

The life (in hours) of a magnetic resonance imagining machine (mri) is modeled by a weibull distribution with parameters β = 2 and δ = 370 hours. (a) determine the mean life of the mri. (round your answer to 2 decimal ) determine the variance of the life of the mri. (round your answer to 1 decimal ) what is the probability that the mri fails before 250 hours? (round your answer to 4 decimal places.)