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:

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?

Consider a game where someone draws three balls from a bag to determine the prize that is won.  In the bag, there are three red balls, two blue balls, and one yellow ball.   If the game is played without replacement, the calculation of drawing a red, followed by a blue, followed by a red would be?

At the amusement park, a researcher stands at the gate of a racing coaster to determine whether the riders choose the left side or the right side to ride.  This is an example of:

The train ride is always a favorite at the amusement park.  A sample of 100 trips taken by the train around the park found that sample mean number of persons riding the train was 107 with a sample standard deviation of 45.    Suppose some researchers want to test a claim that the mean number of persons riding was not 120.  What would the hypotheses be? 

The height at which a hot air balloon company flies its balloons is normally distributed with a mean of 1000 feet and a standard deviation of 50 feet. What percent of the hot air balloon flights will fly higher than 1125 feet?  What percent of the hot air balloon flights will fly lower than 900 feet?    A balloon flying at 1075 feet would have a z-score of? 

Why is it important for substance abuse prevention programs on college campuses to involve faculty, administrators, and students, and how can this comprehensive approach help change the culture of alcohol and drug use in college?

Hair follicle testing can detect drug use that occurred within the past 24 hours

Which of the following is true about the long-term effects of using e-cigarettes?

All forms of tobacco-related organized crime are confined to international smuggling operations.