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A study of attitudes among residents of Florida with regard to policies for handling nuisance alligators in urban areas showed the following.
Find a 90% confidence interval for the mean age, ?, of all people in the civilian labor force. Assume that the population standard deviation for the ages of civilian labor force is 12.1 years. Inter
A candy maker produces mints that have label weight of 20 grams on each box. Assume that the weight of a box of mints is normally distributed with a standard deviation of 0.4 grams.
Each day a large animal clinic schedules 10 horses to be tested for a common respiratory disease. The cost of each test is $80. The probability of a horse having the disease is 0.1. If the horse has
While writing an article on the high cost of college education, a reporter took a random sample of the cost of new textbooks for a semester. The random variable x is the cost of one book. Her sample
A coffee machine delivers volumes of coffee into 8 oz. cups that are normally distributed having and known mean of 60z, but with a unknown standard deviation . It is also known that the cofee machin
Assume that the background niose X of a digital signal has a normal distribution with u=0 volts and theta = .5 volt. ifv we observe n=100 independent measurments of this noise, what is the probabili
How many bottles should be included in the sample if you want to estimate the true mean amount of ketchup to within 0.1 oz with 95% confidence? (Give the answer to the next largest integer.)
What is the value of the objective function at the solution found above?
Now that you are familiar with the basic concepts of statistics, what are some examples of when you have seen or heard statistics used inappropriately?
Use the binomial table to find the numerical value of alpha for this testing procedure. Use the binomial table to find the probability of rejecting the null hypothesis when using this rejection region
Which of the following are determinants of a sample size for a clinical research trial?
Use the 3-day moving average method for forecasting days 4-7. Use the 3-day weighted moving average method for forecasting days 4-7. Use Weight 1 day ago = 2, Weight 2 days ago = 4, and Weight 3 day
The following table shows six years of average annual cost-of-living index data:
Suppose that in the random sample the defective rate is 4%. What does that suggest about the defective rate on the assembly line?
Suppose that Y1, Y2, Y3, and Y4 have a multinomial distribution with n trials and probabilities p1, p2, p3, and p4 for the four cells. Just as in the binomial case, any linear combination of Y1, Y2,
What do the results indicate about the cause of variability in parent sizes and progeny sizes? Remember all individuals are from the genetically pure line #13. These data meet the assumptions of par
1. Assume that the histogram of a data set is symmetric and bell shaped, with a mean of 75 and standard deviation of 10. Then, approximately 95% of the data values were between 55 and 9
A researcher conducted an experiment on the effects of a new "drug "on depression. The researcher had a control group that received nothing, a placebo group, and an experimental group that received
Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to t
The XYZ Inc. buys mother boards for its computer assembly. The following information is available, use generally accepted rounding rules. You will need to develop an excel program for handling this
Assume that the distribution of expense fees is distributed as a normal random variable with a mean of 0.93% and a standard deviation of 0.3%. What proportion of stock mutual funds have an expense f
Describe the logic underlying the use of multiple comparison procedures.
What is the F ratio? Why is the computation of the F ratio based on mean squares instead of sums of squares?