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A coin is known to be either fair corresponding to the null hypothesis H_0: p=1/2 or has heads on both sides corresponding to the alternative H_1: p = 1. We toss 4 times and decide to reject H_0 if we see all 4 tosses resulting in heads. Find the alpha and beta errors of such a procedure. What is the power of such a procedure?
Find out the regression equation Determine the value of Rsquare? Comment on value.
Conceptually we would expect the probability of newborn males and females to be the same. However, census reports indicate that the ratios of males and females in various countries do not conform to the theoretical prediction.
A student is taking a 10 question multiple choice quiz. There are four possible answers to each question. The student decides to guess at random on all 10 questions.
Regression and Correlation are two of the most often used and abused tools in research. People are quick to jump to conclusions that if a relationship exists between two variables, then one must cause (causation) the other. There are many reasons ..
The budgeting process for a Midwestern college resulted in expense forecasts for the coming year (in $ millions) of $9, $10, $11, $12, and $13. Since the actual expenses are unknown, the following respective probabilities are assigned: .3, .2, .25..
If we were to repeat an experiment a large number of times and calculate a statistic such as the mean for each experiment, the distribution of these experiments would be called?
frequency table speednumber of balls 0 - 29430 - 591660 - 896090 - 11920a professional tennis player hit 100 balls and
question two fair dice one red and one green. are rolled. let the event a be the sum of the faces showing is equal to
Evaluated that there is a 95% probability of only slight losses of around $1 million. Using decision tree analysis, determined whether bank must install new power generator.
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern.
question 1 scores are obtained from the law school admission test lsat are normally distributed with a mean score of
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
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