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A regression line was found to predict Foreign direct investment (FDI) (net inflows (% of GDP)) based on year for the Middle East & North Africa. The value of R-squared was 0.427. Interpret R-Squared (if applicable).

Below is a scatterplot describing the relationship between potassium and calories in a single serving of different brands of cereal. Describe using all four characteristics.  

The scores on an exam have a mean of 73. The scores range from 47 to 99. Assume that the data is normally distributed. Which of the following is a plausible value for the standard deviation?

In the summer of 2011, the Chicago libraries recorded the number of participants per branch of the library versus the number of books read from that branch.  They wanted to predict the number of books read at each branch based on the number of participants in the summer program.  The least squares regression equation was  books read = -657.0 +24.74 participants For one branch of the library the number of participants was 1053. The number of books read was 25803.  Find the residual. 

Suppose that you were rolling an seven sided die. The chance that the dice lands on any of its sides is 1/7. What is the chance that you get the same value(for example, a “3”)  four times in a row?

A journalist takes a random sample of UF students and asks them how much they spend on the cell phone service per month.  Suppose that a journalist wants to create a graph of the responses for the college newspaper. What type of graph should she make?

Does someone’s current age affect what they think is an appropriate retirement age? People were polled about both their current age and what they thought would be an appropriate retirement age. They wanted to predict the “appropriate retirement age” by using their current age. The data below is only for male participants.   The average of current age was 33.53 and the standard deviation was 13.84 . The average of appropriate age of retirement was 61.54 and the standard deviation was 8.90. The value for correlation was 0.2021 .   Find the least squares regression equation.

 Below  are box plots of the vertical jump distance for participants in the NFL combine in 2014 grouped by position (POS). What position overall had the highest median  vertical jump distance? 

On July 9th, 2015, the Gallup organization posted an article on their website titled “Most U.S. Smartphone Owners Check Phone at least Hourly”. They showed this information in their article. The participants were asked how often they used their smartphone for any reason. The results from the participants are shown per age.   % Every few minutes % A few times an hour 18-29 yrs.  22 51 30-49 yrs. 12 47   What aspect of the field of statistics is this?

The heights of male students at a university have a mean of 71 inches. The values go from 62 to 79 inches. Assume that the data is normally distributed. Which of the following is a plausible value for the standard deviation?