Computing confidence interval for mean

Assignment Help Basic Statistics

Reference no: EM13105441

The standard deviation of test scores on a certain achievement test is 11.4. A random sample of 100 scores on this test had a mean of 71.2. Based on this sample, find a 90% confidence interval for the true mean of all scores. Complete the below:

What is the lower limit of the 90% confidence interval:___

What is the upper limit of the 90% confidence interval:___

Reference no: EM13105441

Questions Cloud

Explain ugandan cultural attributes : Explain Ugandan cultural attributes that might affect the operations of a foreign company doing business there.

What is the potential difference : In a region where there is an electric field, the electric forces do +8.00x 10^-19 J of work on an electron as it moves from point X to point Y.What is the potential difference, VY - VX, between point Y and point X?

Corporate officers hire corporate directors : In winding up a limited partnership non-partner creditors are paid earlier the partners receive their capital contributions. Corporate officers hire corporate directors

Illustrate what are economics of venture capital business : Illustrate what are the economics of the venture capital business? Assume that Forte is a “top quartile” fund in terms of performance. Illustrate what will the cumulative pay checks and distributions to the limited partners and the general partner..

Computing confidence interval for mean : The standard deviation of test scores on a certain achievement test is 11.4. A random sample of 100 scores on this test had a mean of 71.2. Based on this sample, find a 90% confidence interval for the true mean of all scores. Complete the below:

Determine the confidence interval of the true mean : A food snack manufacaturer samples 11 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 15.2 oz. and the sample standard deviation is 0.40 oz., find the 95% confidence interval of the true mean.

Determine the possible algebraic signs : An unstrained horizontal spring has a length of 0.34 m and a spring constant of 290 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes.

Illustrate what is the ex-dividend price of novis stock : Illustrate what is the ex-dividend price of Novis's stock if the board follws its current policy? At the dividend declaration meeting, several board members claimed that the dividend is too meager and is probably depressing Novis's price. They prop..

Explain interrelatedness of several indigenous religions : As recommended by Fisher (2005) in Living Religions, let the interrelatedness of everything in cosmos as it is expressed in several indigenous religions.

User Account

All Pages