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Briefly describe your experiment. You must have a valid and ethical experiment (NOT an observational study) and/or question. Discuss how the experiment can be done-it needs to be realistic and ethical. Appropriately use vocabulary that only applies to an experiment and not an observational study.
Over the past decade, there has been a strong positive correlation between teachers salaries and prescription drug cost.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter.
Assuming that n = 6 for both samples, calculate each of the sample variances, then calculate the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances.
What is the probability that both defective lights will be found within three trials?
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
Translate this into a statistical hypothesis-testing problem and carry out the test. Be sure to give the null and alternative hypotheses, the value of the test statistic, the p-value, and your conclusions.
For the passengers in the SRS, what is the approximate probability that the mean length of time for them to get through security will be less than 18 minutes?
Suppose that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches.
Using the probabilities above what is the expected size of family you draw?
An occupational health study was carried out to evaluate the health status of workers. The response is forced expiratory volume (FEV), a measure of respiratory function
Automobile manufacturers are interested in the difference in reaction times for drivers reacting to traditional incadescent lights and to LED lights.
Calculate descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Calculate the value of beta for each stock.
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