Exam 1

  • Due Jun 27, 2022 at 7:50pm
  • Points 16
  • Questions 32
  • Available Jun 27, 2022 at 6:20pm - Jun 27, 2022 at 7:50pm 1 hour and 30 minutes
  • Time Limit 90 Minutes
  • Allowed Attempts 2

Instructions

Use the following formulas in the exam.

Median rank is found by (n+1)/2: 

X bar =(Σ𝑛)/𝑛

Standard Deviation (SD) = LaTeX: \sqrt{\sum\frac{\left(\times-\times bar\right)^2}{\left(n-1\right)}}

Predicted y = a + b * x, where   

 Slope b=(r∙sy)/sx ;  and  a=y ̅-bx ̅

r^2=(explained variation)/(total variation)

observed y − predicted y = error

  y− ŷ = error =residual

Standard Error of Regression is se=√(SSE/(n-1)), where SSE stands for the sum of the squared errors

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