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Find the z-score for each student and indicate which one has a better relative position. An Art Major earned a grade of 46 on an exam with = 50 and s = 5; A Theater Major earned a grade of 70 on an exam with = 75 and s = 7.
To find the probability values in case of raw data, binomial, normal
Develop a stem-and-leaf chart. Summarize the number of times each ATM was used. What was the typical, minimum, and maximum number of times each ATM was used?
Determine how large a sample should be taken to be 90% confident that the sample mean is within 0.12 ounces of the true mean weight of our bakery's loaves.
Cast a die a number of independent times until a six appears on the up side of the die. Find the probability density function F(x)= P(X
Suppose the world series is about to begin. Some people get together and each decide to predict different win-loss patterns for the seven possible games during the coming series.
Commute times: three random samples of time in minutes that commuters are stuck in traffic are shown. At anova =0.05, is there a difference in the mean times among the three cities?
Find the critical value having an area of 0.95 to its right for an F-curve with 8 numerator degrees of freedom and 15 denominator degrees of freedom.
Finding appropriate z- and t-scores is important when constructing confidence intervals. Confidence intervals allow one to estimate important population parameters such as population mean, population proportion, population standard deviation, etc.
The random variables, X and Y, have a probability density function given by: By transformation of variables, find the probability density function of Z=X+Y.
What is an appropriate sample space for this experiment?
At the .05 significance level, can we conclude that there is a difference in their mean times?
Suppose that the grams of fat have a normal distribution and form 90%, 95%, and 99% confidence intervals for the mean grams of fat. Based on this data, can we say that the labeling on the package is misleading?
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