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Question: Two six-sided dice are thrown sequentially, and the face values that come up are recorded.
a. List the sample space.
b. List the elements that make up the following events:
(1) A = the sum of the two values is at least 5,
(2) B = the value of the first die is higher than the value of the second,
(3) C = the first value is 4. c. List the elements of the following events:
(1) A∩C,
(2) B∪C,
(3) A∩(B∪C).
Suppose that you take a random sample of 80 people in that city, what is the probability that 7 % or less of the 80 have more than two jobs?
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
Provide a business example that you can apply regression to. State the null and alternative hypothesis using the appropriate phrasing for the type of regression chosen.
The project requires you forecast the historical data, replicating the appropriate trends, seasonalities, week-over-week variability, etc. Please refer to the chapter and materials on Forecasting for the procedures to do.
From previous surveys it is known that the variance of executive salaries is about 40,000,000. What is the minimum required sample size?
This project applies linear regression models to the estimation of automobile prices. The dependent variable is the automobile prices. The independent variables are the variables to explain the price.
State the null hypothesis and the alternate hypothesis. State the decision rule. Compute the value of the test statistic. What is your decision regarding the null hypothesis?
What is the difference between a point estimate and an interval estimate? How would you calculate a confidence interval with a z test?
a quality control inspector will sample products obtained from a manufacturing process until two noncomforing products
The rail shuttle cars at Atlanta airport have a dual electrical braking system. A rail car switches to the standby system automatically if the first system fail
The pooled variance of two samples is:
Question: Identify the independent and dependent variables and at least one potentially confounding variable. State how the confounding variable(s) might be controlled.
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