Tom reports loud snoring, daytime fatigue, pauses in breathing during sleep, and has risk factors such as obesity and high blood pressure, which are common indicators of sleep apnea.  

Researchers wanted to determine whether young couples who marry or co-habituate are more likely to gain weight than those who stay single. The researchers followed 800 men and women for 7 years as they matured from teens to young adults. When the study began, none of the participants were married or living with a romantic partner. By the end of the study 14% of the participants were married and 16% were living with a romantic partner. The researchers found that married or co-habituating women gained, on average, 9 pounds more than singe women and men gained, on average, 6 pounds.Is this situation an observational study or design experiment? Explain.

The data below is a randomly selected sample from the Student Survey involving the results from the question, “What is the distance (in miles) from your home to the College?” Be sure to keep this data set in StatCrunch as there are a number of questions that use this data set. 6.7,  12,  5.4,  6.5,  2.1,  19.2,  9.5,  1.5,  13.5,  7.8,  15.1,  20,  2.5,  25,  31,  1.7 What is the sample size?  

The data below is a randomly selected sample from the Student Survey involving the results from the question, “What is the distance (in miles) from your home to the College?” Be sure to keep this data set in StatCrunch as there are a number of questions that use this data set. 6.7,  12,  5.4,  6.5,  2.1,  19.2,  9.5,  1.5,  13.5,  7.8,  15.1,  20,  2.5,  25,  31,  1.7 Is the shape of this sample skewed left, skewed right, or symmetric? State which graph that you used.

The following histogram was created using data from the MAT 131 student survey involving the variable CINCINNATI {On a scale of 1 to 100 (1 = low rating, 100 = high rating), how much do you like Cincinnati?}.   Chose the following statement(s) that is/are TRUE.  Note, there many be more than one correct answer multiple statements that are true.

The data below is a randomly selected sample from the Student Survey involving the results from the question, “What is the distance (in miles) from your home to the College?” Be sure to keep this data set in StatCrunch as there are a number of questions that use this data set. 6.7,  12,  5.4,  6.5,  2.1,  19.2,  9.5,  1.5,  13.5,  7.8,  15.1,  20,  2.5,  25,  31,  1.7 Which measure of spread would best describe the typical distance for this sample? Explain.

Using the Student Survey data, the following side-by-side box plots are for the variable AGE separated by the variable GENDER. Are there any outliers? If so, identify them (state each AGE values) for each boxplot. 

Consider the following study, reported in the January 2003 issue of Discover –  Scientists subjected a group of male mice to a short, powerful burst of radiation and did nothing to another group of male mice. Mice from both groups were then mated with unexposed females. The mice produced from these pairings (the “children”) were mated with yet another group of unexposed mice. The descendants (the “grandchildren”) of exposed mice were at least three times more likely to have mutations than the descendants (the “grandchildren”) of the unexposed mice.  Is this an observational study or a designed experiment? Explain your answer.

RF Shielding is very important in the set-up of an MRI suite. During construction, the walls and ceiling of the scan room are lined with copper sheeting. This creates what is called a ________________________.

What type of magnetic substance aligns antiparallel to an external magnetic field?