Find confidence interval for the mean weight of all koalas

Assignment Help Basic Statistics

Reference no: EM131430840

Biology and Environmental Science Koalas are not really bears, but are related to the wombat and the kangaroo and live in eastern Australia. These cuddly-looking creatures grow to a size of 23.5 to 33.5 inches and are a threatened species.

A random sample of 35 koalas was obtained, and each was carefully weighed. The mean weight was = 20.75 pounds. Assume σ = 3.05 pounds.

a. Find a 99% confidence interval for the mean weight of all koalas.

b. Researchers believe that if the true mean weight is less than 23 pounds, these animals may be suffering from malnutrition. Is there any evidence to suggest that the koala population is suffering from malnutrition? Justify your answer.

Reference no: EM131430840

Questions Cloud

How much money would the person earn on average : Suppose X is the amount of money a person earns in an hour where? p(X = $5) =0.2, p(X =$10) = 0.1, p(X=$15) =0.5 and p(X=$20) = 0.2. How much money would the person earn on average

Gene for cystic fibrosis : Cystic fibrosis is an autosomal recessive condition. A couple who are both carriers (heterozygous) for the gene for cystic fibrosis have two children who have cystic fibrosis. N= noncystic fibrosis allele, n= cystic fibrosis allele

Accurate estimate of the number of cell-phone : Review the blog: Cell-Phones Only---Whom Should Polls Call and answer the following questions: How might an organization like Pew Research obtain an accurate estimate of the number of cell-phone only households in the first place? What kind of sample..

About the dividend reinvestment plan : The CEO suggested that tit might be a good idea for the firm to begin a dividend reinvestment plan (DRIP) because he believes that the company is a good investment and that most of the firm’s stockholders would prefer to have their dividends reinvest..

Find confidence interval for the mean weight of all koalas : Researchers believe that if the true mean weight is less than 23 pounds, these animals may be suffering from malnutrition. Is there any evidence to suggest that the koala population is suffering from malnutrition? Justify your answer.

Skeletal muscle tissue and cardiac muscle tissue : Explain at least two fundamental differences between SKELETAL muscle tissue and CARDIAC muscle tissue. You may choose to comment on their Anatomical differences or physiological differences.

Find given confidence interval for the mean number of hours : Find a 95% confidence interval for the mean number of hours all employees at Liberty Mutual use the Internet for personal reasons.

Subject is erp profitability analysis : What are some short-term decisions that corporations have made that have ultimately damaged their organizational profitability in the long-run? Why do you think that such behavior is encouraged?\ Subject is ERP Profitability Analysis.

Explicate one of the robert frost poems : Explicate one of the following Robert Frost poems: "Design," "Stopping by Woods on a Snowy Evening," or "The Road Not Taken". Note: You cannot write about "Nothing Gold Can Stay" or "Fire and Ice."

User Account

All Pages