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Question: Professor Stickler always grades "on the curve." "Yes, I see to it that my grades are distributed as 7 percent A's, 24 percent B's, 38 percent C's, 24 percent D's, and 7 percent flunks," he explained to a young colleague. The colleague, convinced that the professor is really a softer touch than he sounds, looked at Professor Stickler's grade distribution for the past year. He found frequencies of 20, 74, 120, 88, and 38, respectively, for the five categories, A through F. Perform a x2 test for the colleague. What do you conclude about Professor Stickler?
When you are interested in finding out if students' achievement level changes over time as result of a reading intervention, what type of ANOVA would you use?
Use stratified random sampling to estimate the mean or total of a population of your choice. In the process of carrying out the survey and making the estimate, think about or discuss with others the following:
Suppose we have 5 Bernoulli trials with probability p of success on each trial.
the worker at a carnival game claims that he can communicate with a small magic rock and to prove it he tells you to
Using a grammar for the C programming language, try to extend the syntax so that a compound statement can appear to compute a value. In other words, allow a compound statement to appear wherever a simple constant or identifier could appear.
When the t distribution is used in constructing a confidence interval based on a sample size of less than 30, what assumption must be made about the shape of the underlying population?
In the normal distribution, the probability that x will exceed (μ + 2σ) is the same as the probability that x will be less than (μ - 2σ). What characteristic of the normal distribution does this reflect?
A random sample of 20 cars driving down I-294 is selected and their speed is monitored. Compute the mean, median, mode, and standard deviation, Q1, Q3, Min, and Max for the above sample data on speed per car
How many independent variables are involved in a 3 x 3 factorial design? How many levels are there of each variable? How many experimental conditions are there? Draw the design.
scores on a mathematics examination appear to follow a normal distribution with mean of 65 and standard deviation of
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
Brooks Insurance Inc. wishes to offer life insurance to men age 60 via the Internet. What is the probability all five men survive the year? What is the probability at least one does not survive?
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