Compute the confidence intervals

Reference no: EM13990322

Milk cartons are advertised to contain one litre of milk. From a random sample of 18 one-litre cartons whose contents were accurately measured by the South African Bureau of Standards (SABS), it was found that the average fill was 0.981 l with a sample standard deviation of 0.052 l. Assume that the fill of one-litre milk cartons is normally distributed.

(a) Using a 99% confidence level, estimate the actual mean fill of all one-litre milk cartons. Interpret your findings and comment on the question: 'Do one-litre cartons of milk contain one litre of milk on average?'

(b) Repeat the exercise in (a) above, but use a 95% confidence level. Explain any differences in the conclusions.

Reference no: EM13990322

Questions Cloud

How can you detect hidden messages in mass media : What happened to the United States in the aftermath of Cloverfield attacks? This requires speculation on your part, remember that we as the audience are watching a classified document from the Department of Defense.

Calculate buckeye companys 2019 operating cycle : The following selected account balances were taken from Buckeye Company's general ledger at January 1, 2019 and December 31, 2019: Calculate Buckeye Company's 2019 operating cycle. Enter your answer as a number (i.e., 94). Do not use decimals or a $ ..

What is the standard deviation of the points per game : What is the standard deviation of the points per game for this sample?a) 5.23b) 5.26c) 27.36d) 27.67e) 272.92

Confidence interval estimate for the true mean : Before entering into wage negotiations, the workers' representative of the newly- formed farm workers trade union wanted to know the average wage of its union members. The average wage of a random sample of 50 members was found to be R2 420 per mo..

Compute the confidence intervals : (a) Using a 99% confidence level, estimate the actual mean fill of all one-litre milk cartons. Interpret your findings and comment on the question: 'Do one-litre cartons of milk contain one litre of milk on average?' (b) Repeat the exercise in (a)..

What is the wavelength of the radio wave in air : An AM radio station broadcasts at 750 kHz. What is the wavelength of the radio wave in air? If the radio wave is tuned to this station and the inductance circuit is 0.10 mH, what is the capacitance in the tuning circuit?

Actual mean dividend yield of all jse-listed companies : Calculate, with 90% confidence, the actual mean dividend yield of all JSE-listed companies last year. Interpret the finding. Compute the confidence interval in (a) using Excel's TINV formula.

Find electric field e both inside and outside the cylinder : An infinitely long cylinder of radius 6 meters has a uniform charge density of 4 nC/m2. By constructing suitable Gaussian surfaces, find the electric field E both inside and outside the cylinder.

How ratios can be used to review a company : How ratios can be used to review a company's financial statements. Select a public company, and using price-earnings ratios that were discussed this week, please tell us how the company is performing from a financial standpoint.

User Account

All Pages