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A coach uses a new technique in training middle distance runners. The times for 8 different athletes to run 800 meters before and after this training are shown below.
Athlete A B C D E F G H Time before training (seconds) 112.7 115.2 109.2 117.2 113.9 118.7 115.2 110.4 Time after training (seconds) 113.3 113.9 106.8 118 112.1 118.8 111.6 106.5
Using a 0.05 level of significance, test the claim that the training helps to improve the athletes' times for the 800 meters.
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience (to 2 decimals)?
Body temperature. We have all heard that 98.6 degrees Fahrenheit (or 37 degrees Celsius) is "normal body temperature."
A simple random sample of n = 300 full-time employees is selected from a company list containing the names of all N = 5,000 full-time employees in order.
1. in 2005 the average gpa for students was 3.15. a sample in 2008 showed that the average gpa for students was 3.46.
After popping, the un-popped kernels were counted. There were 89. Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
a particular manufacturing design requires a shaft with a diameter between 19.88 mm and 20.018 mm. the manufacturing
Draw the relevance diagram corresponding to the tree below. Then reorder the distinctions so that they are in the order C, A, B.
On a police sergeants exam, the historical mean scored was 80 with a standard deviation of 20. Four offiers scored 195,175,191, and 189 respectively
Bank tellers. I am the only bank teller on duty at my local bank. I need to run out for 10 minutes, but I don t want to miss any customers.
A pilot survey reveals that 5 of the 50 sampled hold two or more jobs. How many in the workforce should be interviewed to meet your requirements?
A random sample of hospitals will be obtained, and the resulting information will be used to test the relevant hypothesis. State the null and alternative hypotheses in terms of p, the population proportion of hospitals experiencing increased costs..
Suppose the mean time that was observed for the sample last month was 4 hours 44 minutes (284 minutes). What is the probability of seeing a sample mean this high or higher?
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