The parking gate at the amusement park kept records for seve…
The parking gate at the amusement park kept records for several years about the number of cars waiting in line to pay for parking one Tuesday at 3 PM. The data collected is below in the probability distribution. X = number of cars 0 1 2 3 4 p(x) 0.1 0.3 0.4 0.1 0.1 What is the expected number of cars in line for parking on any given Tuesday at 3 PM?
Read DetailsA researcher is asked to determine whether a there is a line…
A researcher is asked to determine whether a there is a linear relationship between the number of years since a wooden roller coaster was built and the total maintenance cost to date. The researcher determines the least squares regression line to be where y represents the total maintenance costs to date and x is the number of years since the coaster was built. The total maintenance cost to date is the: The value of the linear correlation coefficient, r, was found to be 0.95. This tells the researcher the following: What would be the predicted total maintenance cost for the wooden coaster ten years after construction? If the actual (observed) cost of the maintenance after ten years is $20000, the residual for this would be:
Read DetailsA coaster enthusiast group decided to have an outing at the…
A coaster enthusiast group decided to have an outing at the local amusement park. Some members of the group want to test a claim that a proportion less than 0.10 are over the age of 70. A random sample of 100 members was taken and it was found that 6 of the 100 were over the age of 70. Take alpha to be 0.05. The z-statistic would be: The p-value would be: The critical z-statistic (z crit) would be: What action should be taken?
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