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A coin is tossed 7 times. Let A be the event that the first toss is heads. Let B be the event that the fifth toss is heads.
a. Are A and B mutually exclusive? Why or why not?
b. Are A and B independent? Why or why not?
A report states that 46% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 96% confidence?
Show some work for each part. A diagram can be helpful. A survey of adults found the following: 65 percent of the adults drink coffee. 35 percent drink tea. 80 percent drink coffee or tea (or both). If we choose a surveyed adult at random, find t..
Utilizing form of Regression method which would give you highest performing model to forecast Sales. Utilizing your model forecast the sales
What is statistical power? How does a researcher decide whether to use a one-tailed or two-tailed test? What are the advantages and disadvantages of using a two-tailed test?
Critically illustrate out the characteristics of a standard normal distribution? Can two distributions with the same mean and different standard distributions be considered normal?
the number of calls received by a phone operator at an emergency department between 10-11am has a poisson distribution
q1. the discussion surrounding the anova is very important. this is a widely utilized statistical tool. what is the
21 percent of the employees in a company have managerial positions, and 31 percent of the employees in the company have MBA degrees. Also, 66 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employee..
The national average SAT score (for Verbal and Math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. If a random sample of 200 scores were selected and the sample mean were calcula..
The original simple form of the Connecticut state lottery (ignoring a few gimmicks) awarded the following prizes for each 100,000 tickets sold. The winners were chosen by drawing tickets at random. If you hold one ticket in this lottery, what is y..
Show that if the roots of the polynomial p are all real, then the roots of p' are all real. If, in addition, the roots of p are all simple, then the roots of p' are all simple.
She will make the mean raise $1000 and the standard deviation $179. Basing this on worker productivity (toys constructed), the most productive 10% of employees will see a raise of at least how much?
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