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The distribution under the normal curve can be seen a lot in society, although you may not even notice it. Have you been watching the presidential candidate polls on tv? If you ever see the +- 3 that is beside the percentage given on if they are winning; that is the standard deviation. This is exactly what they are referring to. So really, how accurate are those polls? What do you think of the Republican nominees so far?
Now, here's another example. If we say that the average on the first exam was a 76% with a standard deviation was +-5%. What percent of students in the class scored between 66% and 86% on the exam? How did you come up with this? Explain?
given a one independent variable linear equation that states cost in k and given the following information calculate
What concepts and constructs would you use to study this phenomenon? How might the concepts or constructs relate to explanatory hypotheses? Explain.
Then repeat the process of generating 1000 confidence intervals. Report the percent hit. How does this compare with the percent hit that you found in the previous exercise?
Base on a survey of over 10,000 households, the number of televisions in the home was recorded as given in the table below. Based on the data, find the expected number of televisions in a home.
dilbert is in charge of evaluating a new machine that manufactures shoelaces. in particular he needs to estimate the
The computer breaks down x times during t hours, it costs 50x2 dollars to fix it. How should the company select t in order to maximize the expected profit?
(1) You should start by running the same test he did in which he came to the decision that he could not conclude a difference. (2) Perform the test as it should have been done and find if you come to a different conclusion. (3) Explain why the result..
Gas station sells 1400 gallons of gasoline per hour if it charges $ 2.05 per gallon but only 1100 gallons per hour if it charges $ 2.95 per gallon. What should gasoline price be to sell 1000 gallons per hour?
Set up a hypothesis test - State the null and alternative hypothesis and Confidence intervals of scores and the z or t intervals. Do a P test. Are the two tests consistent
Let {W{t),t ≥ 0} be a Brownian motion with drift coefficient μ and diffusion coefficient σ2. We assume that the flow of a certain river can be modeled by the process {X(t),t ≥ 0} defined by
What does the y-intercept represent in terms of linear analysis (and linear regression analysis) and give an example of how it can no significance in a problem?
heights of 10 year old girls follow an approximately normal distribution with mean of 54.4 and a standard deviation of
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