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If confidence interval for sample mean (that is population mean) is (114.4, 115.6), what is the value of sample mean? If the interval represents 90 % confidence interval, what would the 99 % confidence interval be?
We have already been introduced to sensitivity analysis via the geometry of a simple example. We saw that the values of the decision variables and those of the slack and surplus variables remain unchanged even though some coefficients in the objec..
If the population standard deviation is σ = 10, can you conclude that the treatment has a significant effect? Use a two-tailed with α = .05.
If we have a random sample of 6 patients who press call buttons. What is the probability that under 4 of them will have to wait five minutes to more for staff to respond?
Find/discover an example of statistics in the news to discuss the following statement that represents one of the objectives of statistics analysis: "Statistics helps us make decisions based on data analysis.
State the largest possible domain for the definition of the function. f(x,y) = cube-root(y^2-x)
Now consider the real numbers. In fact, lets narrow our focus way down to just the part of the real line between 0 and 1. Circle that part of the real line. How many real numbers are there in between 0 and 1? What can you conclude from all this?
Suppose that distribution is normally distributed. If worker at this fast food restaurant is chosen at random,determine the probability that worker earns more than $6.75?
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
Find the marginal PMF pY (y). Hint: One possibility is to start with the answer to part (c), but the algebra can be messy. But if you think intuitively about the procedure that generates Y , you may be able to guess the answer.
Why is it important that a sample be random and representative when conducting hypothesis testing?
3% from excise taxes and 5% other. If a revenue source is selected at random, what is the probability that it comes from individual or corporate income taxes?
Create a histogram for the following data of the number of miles from residence to place of employment for 30 randomly selected residents of Middletown County.
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