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A regional track championship has decided that they will invite the fastest 15% of runners in their region (runners with the shortest time). The mile time of all potential runners in this region are normally distributed with a mean of 8.2 minutes and a standard deviation of 1.5 minutes. What is the cutoff time for a runner to qualify for the regional track championship?
Find out the earliest completion time for play and critical path.
You are testing a null hypothesis that there is no linear relationship between two X and Y. From your sample of n=20, you determine that SSR=60 and SSE=40
What is the OR of getting cancer fora late child birth woman compared to an early first birth woman?
A portfolio manager believes that tomorrow's foreign exchange rate of German marks per US dollar will be Normally distributed with mean 2.03 and standard deviation 0.08. Using the manager's numbers:
What does the intercept mean in this context? What is the estimated percent decline in visual field per year?
Suppose the joint probability density function of X and Y is uniform in the plane square with corners (0,0), (0,3), (3,0) and (3,3). Find the probability of X > 1 or Y > 1. Find the probability of X + Y
A study was conducted to estimate the mean amount spent on birthday gifts for a typical family having two children. A sample of 195 was taken, and the mean amount spent was $210.97.
What are the four levels of measurement scales? Give examples of each and explain in detail. Explain the use of normal probability plot to evaluate whether a set of data is normally distributed? Please discuss in detail.
Mean operating cost for the fleet of delivery trucks because the sample mean is contained in the interval. Do you agree? How would you interpret this confidence interval?
Calculate the standard deviation of BMI. Calculate the median BMI. The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes.
Suppose you are a researcher who has collected and analyzed a sample of values. When you perform a hypothesis test the p-value is calculated to be 0.051. Would you reject or fail to reject the null hypothesis? Defend your choice.
a nursing school wants to estimate the true mean annual income of its alumni. it randomly samples 120 of its alumni.
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