Consider a T Distribution with 15 degrees of freedom. Compute P(>or= -1.43)
Round your answer to at least three decimal places.
Consider a T distribution with 20 degrees of freedom. Find the value of c such that P(-cor=to K) = 0.05 Round your answer to at least two decimal places.
Find the median of the chi square distribution with 9 degrees of freedom. Round your answer to at least two decimal places.
central limit theorem- sample mean A soft drink company has recently received customer complaints about its one liter sized soft drink products. Customers have been claiming that the one liter sized soft drink products contain less than one liter of soft drink. The company has decided to investigate the problem. According to the company records, when there is no malfunctioning in the beverage dispensing unit, the bottles contain 1.015 liters of beverage on average, with a standard deviation of 0.14 liters. A sample of 70 bottles has been taken to be measured from the beverage dispensing lot. The mean amount of beverage in these 70 bottles was .995 linters. Find the probability of observing a sample mean of .995 liters or less in a sample of 70 bottles, if the beverage dispensing unit functions properly.
Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.
Confidence interval for population mean: standard normalThe life time of a certain brand of electric light bulb is known to have a standard deviation of 48 hours. Suppose that a random sample of 90 bulbs of this brand has a mean lifetime of 495 hours. Find a 95% confidence interval for the true mean lifetime…