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Suppose that a highway patrol person wants to estimate the proportion of all drivers speed, and that she wants to be able to assert with probability of at least 0.95 that the error of her estimate will not exceed 0.07. How large a sample, n, will she require if she has no idea what the true proportion is.
Find the value of Proportion and construct a 90% confidence interval for proportion.
Students whose test scores are in the upper 10% are eligible for scholarship opportunities for college. What is the test score that corresponds to the upper 10% cutoff point of the probability distribution?
Compute the mean, median, and mode. Which of these measures of central tendency do you think most accurately describes the lifestyle variable you are looking at?
A researcher computes the mean, the median, and the mode for a set of n = 50 responses to this question. Which of the following statements accurately describes the measures of central tendency?
For a disease such as pancreatic cancer, which is highly fatal and of short duration:
Using the first two digits of the measurement as your stem, construct a stem and leaf display of the data above.
What is a discrete random variable and how does it differ from a continuous random variable? Give examples.
Graph inequality. Using the test point method.
For each of the following, indicate whether the type of probability involved is an example of a priori probability, empirical probability, or subjective probability.
Test the hypotheses that the average household income in the township is greater than $100,000. Hint: Start by stating the null and alternative hypotheses.
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
Identify the level of measurement (nominal, ordinal, interval, ratio) for the number of shares held by stockholders.
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