Calculating confidence interval on mean

Reference no: EM13104803

What is the difference between calculating a confidence interval on the mean vs calculating the confidence interval on a proportion?

How do you identify which is the one you should use?

Reference no: EM13104803

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Maximum error of estimate : A confidence interval estimate for the population mean is given to be (40.45, 49.24). If the standard deviation is 11.159 and the sample size is 35, answer each of the following (show all work):

Probability related to sales of an item : The following frequency table lists the sales of an item and the number of times it has occurred. It was obtained from historical records.

Determine the final mass of vapor in the tank : Water is contained in a closed, rigid, 0.25 m3 tank at an initial pressure of 5 bar and a quality of 60%. Heat transfer occurs until the tank contains only saturated vapor. Determine the final mass of vapor in the tank, in kg, and the final pressu..

Repeated weighings of specimen for confidence interval : A laboratory scale is known to have a standard deviation of = 0.001 gram in repeated weighings. Scale readings in repeated weighings are normally distributed, with mean equal to the true weight of the specimen.

Calculating confidence interval on mean : What is the difference between calculating a confidence interval on the mean vs calculating the confidence interval on a proportion?

Determine the net charge on each drop : Two negative, equally charged drops of water, 0.80 mm apart, exert an electrostatic force of 78.5 x 10-9 N on each other. Determine the net charge on each drop. Give your answer in the form "a.bc" pico-Coulombs.

Calculate the annual inventory ordering costs : A manufacturing operation must periodically purchase bulk quantities of machine screws. The operation expects to consume 18,200 boxes of screws over the coming year.

Probability that they will pass the proficiency exam : Suppose that students in a particular school are all very competent. For each individual, the probability that they will pass the proficiency exam (independent of thier classmates) is 0.99

Tests from confidence intervals : A confidence interval for the population mean tells us which values of mean are plausible (those inside the interval) and which values are not plausible (those outside the interval) at the chosen level of confidence.

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