1. The following information regarding a sample of seven students is provided.

StudentIdentificationGrade PointClassificationGenderRank in

NumberAverage Class

Adam12342.89SeniorMale15

Brandon89782.01JuniorMale25

Jason65783.97FreshmanMale3

Marissa23453.98SophomoreFemale2

Michelle89012.67SeniorFemale18

Wendy77894.00SeniorFemale1

Webster67803.77FreshmanMale4

1a. How many variables are in this data set?

1b. How many observations are in this data set?

1c. Which variables are categorical and which are quantitative variables?

1d. What measurement scale is used for each variable?

2. The highway patrol is interested in determining the average speed of automobiles traveling on I-75 between Chattanooga and Atlanta. To accomplish this task, the speed of every tenth car passing a particular point on I-75 is recorded.

2a. What is the population for this study?

2b. What constitutes the sample?

2c. Is speed a categorical or a quantitative variable?

2d. What type of measurement scale is used?

3. A sample of 10 students was selected from a large statistics course. The grades of the 10 students on their test are shown below:

94 61 96 66 92

68 75 85 84 78

3a. Create a histogram, with the first class being 60-69. ( You can either draw it by hand or use Excel)

3b. Calculate the following for the above data. Please only report the results.

Mean = _____

Median = _____

Mode = _____

Range = _____

3c. Calculate the standard deviation for the above data, with the calculation procedures reported.