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Judy's measured potassium level varies according to the Normal distribution with mean = 3.8 and standard deviation = .2. A patient is classified as hypokalemic if the potassium level is below 3.5.
(a) If a single potassium measurement is made, what is the probability that Judy is diagnosed as hypokalemic?
(b) If measurements are made instead on 4 separate days and the mean result is compared with the criterion 3.5, what is the probability that Judy is diagnosed as hypokalemic?
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 10 antennas, find the probability that:
Determine Probability values based on discrete distribution.You roll a fair die three times.
mean is calculated for each sample, then the average distance between M and u would be:
Use a 95% confidence interval for multiple comparisons. Show your calculation by hand between Monday and Tuesday. Match your answer with Minitab output. Attach Minitab output.
How large sample size must be taken to be 95% confident.
Vince Showers, Managing Director for Sleaz Entertainment, claims that the average age of their customers is at least 23. If this is not the case, Showers will face charges of violating local ordinances regarding public decency.
A math course has 2 sections. Section one has 55 students of which 10 received an A. Section two has 45 students of which 11 received an A. If a student was chosen randomly from 100 students
Which test do we use to see if the difference in our sample is statistically significant? Why? Should it be one or two-tailed?
Then explain your answer to someone who has never had course in statistics (but who is familiar with mean, standard deviation, and Z scores.)
Data follow. Use Excel to create the 90% confidence interval estimate of mean age of all of this magazine's subscribers.
Among 620 adults selected randomly from among the residents of one town, 18.9% said that they favor stronger gun-control laws.
The variable recorded for each subject was the number of additional yards (possibly negative) that the subject could drive the ball by the end of the season. In the two-way ANOVA the DFM
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