Because Statistical Software Plays Such an Important Role in Modern

question 79

Multiple Choice

Because statistical software plays such an important role in modern statistical applications,many studies have encouraged the use of technology in statistics courses.The Guidelines for the Assessment and Instruction in Statistics Education (GAISE) (Aliaga et al. ,2005) project was funded by the American Statistical Association to examine needs for college level statistics courses.One of the six recommendations from GAISE is the use of technology for developing conceptual understanding and analyzing data.A survey was sent to students at 100 different universities across the United States to access the relationship between ease of learning the statistical software program SAS and a student's currently level of SAS proficiency.The results of the survey are published in Jackson et al. ,2011,in the International Mathematical Forum journal and are shown below. Table 1.Two-way table for ease of learning SAS and SAS proficiency level. What is the value of L?

• A)112
• B)100/112
• C)32/100
• D)None of the above

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Definitions:

Minors

Submatrices formed by deleting one or more rows or columns from a matrix, used in the calculation of determinants and inverses.

Augmented Matrix

A matrix created by adding the columns of two specified matrices together, usually representing a system of linear equations.

Back-substitution

A method used in algebra to solve systems of equations by solving one equation first and then substituting its value into other equations.

Variables

Symbols in mathematics that represent unknown quantities or can take on various values in an equation or expression.