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Amanda and Ben are in different statistics classes. Amanda scores a 15 on a quiz. Her classmates have a mean of 20 and the standard deviation of 5 on the quiz. Ben scores a 70 on a quiz. His classmates have a mean of 75 and a standard deviation of 10 on the quiz. Who did better relative to their classmates?
Use the large-sample inference procedures to construct a 95% confidence interval for the true proportion of congregations in which the typical sermon lasts more than 30 minutes.
A large medical center's oncology program reported an increased number of cases of pancreatic cancer during a certain month.
United Airlines established a discount airline named Ted. The managers were interested in determining how flyers using Ted rate the airline service. They plan to question a random sample of flyers from the November 12 flights between Denver and Fo..
In an industry,200 workers,employed for a specific job,were classified according thier performance and training received/not received to test independence of specific trainig and performance.The dates is
1. Find the population variance for the heights of the 50 males given. 2. Use the height data and the tables found in for the following:
Develop a 95% confidence interval using data from this study. 2. Perform a hypothesis testing using data from this study. (show all the the appropriate steps). 3. Suggest another statistical technique(s) for the purpose of this study.
Translate the following arguments into symbolic form.- If the police take you into custody, then if they inform you that you have the right to remain silent, then whatever you say will be used against you.
You are given a member function of a random process as where the amplitude is in volts. Construct a histogram of y(t).
Use the .05 significance level and the 5 step hypothesis testing process to check if there is a difference in the mean flight times among the three airlines.
Why is it important to promote a sample of names not meeting the selection criteria when rolling out with a new selection criteria?
Mean and standard deviation for new sample were then computed to be M _ 6 and s _ 3. Write down the values of mean and standard deviation for original sample?
Why can you not have a z- score equaling 0/0 ? what is problematic with calcutlating a z-score for a data set of repeated entries?
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