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You will take either a basket-weaving course or a philosophy course, depending on what your advisor decides. You estimate that the probability of getting an A in basket weaving is 0.80, while in philosophy it is 0.60. However, the chances of your advisor choosing the basket-weaving course is only 40%, while there is an 60% chance that he will put you in the philosophy course. What is the probability that you end up with an A? (Enter your answer to three decimal places.)
Suppose that 10 years ago the average annual expense for stock funds was 1.19 percent. Let µ be the current mean annual expense for all stock funds, and assume that stock fund annual expenses are approximately normally distributed.
Results are normally distributed with mean 200 and standard deviation 50. find probability that a single score will be less than 264.
You are looking at two used cars at a dealership. They are both the same year, make, model, color and price. You decide to ask the salesman which is more reliable.
you work for a consumer watchdog publication and are testing the advertising claims of a light bulb manufacturer. the
Normal with a standard deviation of 0.3 inch. How does the diameter of an orange at the 67th percentile compare with the mean diameter?
Part variability is critical in the manufacturing of ball bearings. Large variances in the size of the ball bearings cause bearing failure and rapid wearout.
A random variable has a standard deviation of 16, and an unknown mean. Find the lowest size of a simple random sample so that the sample mean estimates the population mean with a standard error no larger than 0.25.
Given that the price-to-earnings ratios are uniformly distributed, answer the following questions. What percent of price-to-earnings ratios are between 1.90 and 2.48?
What is the importance of hypothesis testing for independence of variables using two-way tables? Is there an example of this for a better understanding?
Does the effect of education vary by gender? Construct any interaction variables you need and test the joint hypothesis using appropriate restricted and unrestricted regressions.
Suppose the probability you will get an A in this class is .25 and the probability you will get a B is .50. What is the probability your grade will be above a C?
What is the appropriate conclusion based on the outcome of the hypothesis test?
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