Confidence level and sample size

Reference no: EM1394239

A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos and DVDs last year. The standard deviation of this sample was 9 hours.

How large a sample should be used to be 90 percent confident the sample mean is within 1.0 hour of the population mean?

Reference no: EM1394239

Questions Cloud

Example of a null and alternative hypotheses : What would be a good example of a null and alternative hypotheses for a decision relevant in life? What Type I and Type II errors could occur with your decision-making process?

Explain how does wild planet involve the children : Illustrate what basic principles does Wild Planet adhere to in their product development? Which is, think about non-product benefits to the child also in the long term benefits to Wild Planet which ensue.

Chloroplast thylakoids isolated for biochemical experiments : Chloroplast thylakoids can be isolated and purified for biochemical experiments. Probes to measure pH are used to measure the interior thylakoid compartment and solution surrounding the thylakoids.

Sample size for population proportion : You are asked by the owner of the Starshine Motel to develop a customer satisfaction survey to determine the percentage of customers who are dissatisfied with service.

Confidence level and sample size : A film alliance used a random sample of 50 U.S. citizens to estimate that the typical American spent 78 hours watching videos and DVDs last year. The standard deviation of this sample was 9 hours.

Did smith have express, implied : Did Smith have express, implied or apparent authority to sign the contact the imposed liability on TLC.

Evaluate the strengths and weaknesses of smith''s reasons : Jessica Boland works for Sea Biscuit Co. She and Farah Smith, her manager, are preparing adjusting entries for annual financial statements. Boland computes depreciation and records it as: How should depreciation be recorded? Do you support Boland o..

State the decision rule and sketching : Is there a significant difference in sales dollars of hats between the west side and east side stores at the 5 percent level of significance? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic and stat..

Describe main reason for painting self portrait : Describe your main reason for painting the self portrait. 2. Explain the artistic choices in composing : use of color, space, etc.

User Account

All Pages