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As discussed in the text, it often is possible to use a theoretical distribution as an approx imation of the distribution of some sample data. It is always important, however, to check to make sure that your data really do fit the distribution you propose to use.
Consider the halfway-house data again. We calculated the sample mean x- = 380.4 and the sample standard deviation s = 217.6. Taking these as approximately equal to μ and σ, use the Z table in Appendix E to find normal cumulative probabilities for dollar costs of 200, 300, 400, 500, 600, and 700. How do these theoretical normal probabilities compare with the data-based probabilities from the CDF in Figure 10.4? Do you think that the normal distribution is an appropriate distribution to use in this case? You might sketch the normal distribution CDF and superimpose it on Figure 10.4 to obtain a visual feel for how the normal distribution fits the data.
Are Violent Crimes Distributed Uniformly? Based on data from the Federal Bureau of Investigation, violent crimes in a recent year occurred with the distribution given in the accompanying table.
a popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal
Interpret the three confidence intervals in terms of whether there is a significant difference between the mean of the sample and a hypothesized mean of 150.
What is the (a) Minimum number of doctors required so that at least 70% of the arriving patients can receive treatment immediately
This section examines hypothesis testing, and calculating and interpreting basic parametric and non-parametric tests. You will learn the difference between a null and alternative hypothesis, and how to set up the hypothesis (the specific symbolic ..
life expectancies for men and women were measured by country. it was found that the average male life expectancy was
How many ways are there of obtaining 10 patients expressing a preference for drug A. Repeat for 9 patients. 8 patients. ... 1, 0 patients. Tabulate your results - What is the probability of having eight patients express a preference for drug A if ..
a 12-bit ad converter has an input range of plusmn 10 v and is connected to an input amplifier with a programmable gain
can someone please check my answer for the following pdf if its correct can you then explain how i would get ex in this
a human resource manager at a large company wants to estimate the proportion of employees that would be interested in
If the airline books 76 people on a flight for which the maximum number is 74, what is the probability that the number of people who show up will exceed the capacity of the plane?
a psychologist would like to evaluate the relationship between academic ability as measured by the act and academic
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