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Jon works as a "sanitation engineer" for a zoo. Every day he goes to work he feels like he is shoveling a great deal of waste and he wants to know if the amount of waste that he disposes of is greater than 1500 pounds (which is the national average according the American Zoological Review.). Assume a population standard deviation of 200 pounds. In a random sample 25 days, Jon removes an average of 1588 pounds of waste per day. With a .05 level of significance, can we conclude that the population mean amount of crap Jon disposes of per day is greater than 1500 pounds?
a. Is the sample size large enough to ensure valid inference? If you aren't sure, how would you determine whether or not the sample size was large enough)?
b. State the null and alternative (research) hypotheses.
c. Test the hypothesis using the critical value approach.
d. Test the hypothesis using the p-value approach.
Construct and interpret the 90% confidence interval
Satellite Office Systems has vacancies for two executives that it will fill from among four women and six men. What is the probability that exactly one woman is selected?
Provide an example of an application of the normal distribution. Explain why standard normal distribution can be used to find the probabilities for all normal distributions?
approximately 8.33 of men are colorblind. you survey 8 men from the population of large city and count the number who
The company sells lawnmowers for $895 each. The variable cost per lawnmower is $520. The company's monthly fixed costs are $84,500.
1. A clinical trial is conducted comparing a new pain medication for arthritis.
question the weights of packets of cookies produced by a manufacturer have a normal distribution with mean 202 grams
Determine the values of the slack and surplus variables and interpret them. Which constraints are binding constraints? Describe.
Determine whether the following situations represent a right, left or two-tailed test: In 1997, 43% of Americans 18 years or older participated in some form of charity work.
Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant.
a local tennis pro-shop strings tennis rackets at the tension pounds per square inch requested by the customer.
At the 0.01 level of significance, can the student group conclude that there is a difference in average textbook prices for new textbooks sold on campus and over the Internet?
Developing the histogram and pie chart for the sample data.
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