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1) Although Dr. Marshall’s and Dr. Benson’s PSY 210 classes had the same mean Quiz 1 grade ( = 80%), Dr. Marshall’s class had a standard deviation of…

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1) Although Dr. Marshall’s and Dr. Benson’s PSY 210 classes had the same mean Quiz 1 grade (µ = 80%), Dr. Marshall’s class had a standard deviation of σ = 5 and Dr. Benson’s class had a standard deviation of σ = 10. Which class had more consistent grades?In which class would a grade of 85% be most impressive?A) Dr. Benson; Dr. MarshallB) Dr. Benson; Dr. BensonC) Dr. Marshall; Dr. MarshallD) Dr. Marshall; Dr. Benson2) Find the standard deviation for the following population data.6, 4, 4, 3, 3, 2, 2, 2, 1A) σ = 1.5B) σ = 1.031C) σ = 1.414D) σ = 2E) σ = 0.943F) σ = 8.4853) Find the standard deviation for the following sample data. X f 8 2 7 1 6 4A) s = 0.776B) s = 1.458C) s = 0.905D) s = 6.194E) s = 0.951F) s = 0.880G) s = 6.6904) A sample has a standard deviation of 5. What is the variance for this sample? A) 5B) 25C) 10D) There is not enough information to determine the sample variance.E) 2.236

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