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A random variable, X, has a probability density function, f(x) = 2x for 0 < x < 1.
Find the difference between 10th percentile and the 90th percentile.
Our analysis table gives a p-value of 0.01 for Pressure -- all other effects have large pvalues -- larger than 0.25. What does this all mean?
the study found 87 per cent of 1500 australians surveyed would support colour-coding on packaged food to indicate
Explain in detail what the optimum Neyman=Pearson test is for all values of the false alarm probability a in the open interval (0,1).
Assume there are 18 homes in the Quail Creek area and 9 of them have a security system. Five homes are selected at random: what is the probability all five of the selected homes have a security system?
24 of the students in the sample received an "A". Test the instructor's claim at a 5% level of significance. What is your conclusion?
To determine whether the mean nicotine content of a brand of cigarettes is greater than the advertised value of 1.4 milligrams, a health advocacy group tests.
What advantage does correlation have over a cross-tab?
Why are you no longer directly comparing sample means? How does using the F test - the analysis of variance (ANOVA) reduce your Type I error rate? What is the difference between a within-groups and a between-groups variance?
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the mean value assuming a normal distribution.
If you are performing a hypothesis test using a z statistic in which you sampled 50 people and found an average SAT verbal score of 542 (assume we know the population mean to be 500 and the standard deviation to be 100)
Find the probability that a given mouse will live. a. more than 32 months b. less than 28 months c. between 37 and 49 months.
What is the probability that 25% or fewer male employees will indicate that they have to pick up the slack for moms working flextime?
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