Estimate of true population mean amount of glue

Assignment Help Basic Statistics

Reference no: EM13134321

A quality control analyst wants to estimate the actual amount of glue contained in 2-litres cans produced from a well-known manufacturer. It is known from the manufacturer's specifications that the standard deviation of the amount of glue is equal to 0.04 litres. A random sample of 80 cans is selected, and the sample mean amount of glue per 2-litre can is 1.990 litres.

1.1 Set up a 99% confidence interval estimate of the true population mean amount of glue contained in a 2-litre can.

1.2 On the basis of your results, do you think that the quality control analyst has a right to complain to the manufacturer? Why?

1.3 Does the population amount of glue per can have to be normally distributed here? Explain.

1.4 Explain why an observed value of 1.96 litres for an individual can is not unusual, even though it is outside the confidence interval you calculated.

1.5 Suppose that you used a 95% confidence interval estimate. What would be your answers to 1.1 and 1.2?

Reference no: EM13134321

Questions Cloud

Calculate consolidated retained earnings : sales $2,555,500, $1,120,000 prepare a consolidated financial statements workpaper for year ended dec. 31, 2013. prepare a schedule to calculate consolidated retained earnings on dec. 31, 2013. use an analytical or t-account.

What percentage of jazz cds play between given minutes : Mean 52 and standard deviation 7; N(52, 7). According to the 68-95-99.7 rule, what percentage of jazz CDs play between 38 and 59 minutes?

Maximum feet-pythorean theorem problem : An extension ladder adjusts in length from 10 ft to 16 ft. Suppose you've leaned your ladder against your house, so that, at its minimum length, it touches the base of your first floor window, 9 feet above the ground.

Determining the depletion expense : The estimated residual value of the property is $80,000. During 2009, the company extracted and sold 4,000 tons of ore. The depletion expense for 2009 is:

Estimate of true population mean amount of glue : Set up a 99% confidence interval estimate of the true population mean amount of glue contained in a 2-litre can. On the basis of your results, do you think that the quality control analyst has a right to complain to the manufacturer?

What is the difference between unit-level and batch-level : What is the difference between: unit-level, batch-level, product-level, and facility-level activities?

Calculate the amount of heat liberated : Calculate the amount of heat liberated (in kJ) from 405 g of mercury when it cools from 94.0°C to 14.0°C.

What proceeds does wells fargo receive from the investors : Wells Fargo sells $200,000 of bonds to private investors. The bonds are due in five years, have an 8% coupon rate, and interest is paid semi-annually. The bonds were sold to yield 6%. What proceeds does Wells Fargo receive from the investors?

Process cost accounting problem : In addition Explain what type of manufacturing would use the "Process Cost Accounting" to account for cost of manufacturing.

User Account

All Pages