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Question: 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.
A random sample of 100 teenagers was surveyed, and the mean number of songs that they had downloaded from the iTunes store in the past month was 9.4 with the results considered accurate is within 1.4 (18 times out of 20).
in the pharmaceutical industry quality engineers are responsible for maintaining the quality of drug products produced
The organization that you work for has been thinking about implementing an ERP system. They have asked you to prepare a summary of this topic. Research the subject of ERP implementations to determine what problems and issues companies have encount..
Sensitivity of 0.98 and false-positive rate of 0.01. Calculate and interpret meaning of PV+, if test is used in the population which has the disease prevalence of 0.001.
Expected Commercial Value Forcast
It sells its beer to one hotel only, and that hotel has said it wants 550 cases this month. What price does HPU need to charge to break even?
Travel and Transportation The Boeing 747-8 is a technologically advanced aircraft with a new wing design and GEnx-2B engines, and is capable of holding.
The speeds of vehicles (in mph) passing through a section of Highway 75 are recorded for a random sample of 150 vehicles and are given below. Test the hypothesis that the speeds are normally distributed with a mean of 70 and a standard deviation o..
A national survey is conducted to assess the association between hypertension and stroke in persons over 55 years of age. Compute the incidence of stroke in persons over 55 years of age
Construct a 95% confidence interval for β1.- Construct a 95% confidence interval for E(y) when x = 125.- Construct a 95% prediction interval for y when x = 125.
suppose that we have a sample space s e1 e2 e3 e4 e5 e6 e7 where e1 e2 . . . e7 denote the sample points. the
In American football, touchdowns are worth 6 points.
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