Can the variance of a data set ever be negative? Explain. Can the variance ever be smaller than the standard deviation? Explain.
Answer to relevant QuestionsCalculate the variance and standard deviation for samples for which a. n = 10 , ∑x2 = 84, ∑x = 20 b. n = 40, ∑x2 = 380, ∑x = 100 c. n = 20, ∑x2 = 18, ∑x = 17 Refer to the Environmental Geology (Vol. 58, 2009) study of how far a block from a collapsing rock wall will bounce, Exercise. The rebound lengths (meters) for a sample of 13 rock bounces are reproduced in the table below ...Refer to Exercise and the Centers for Disease Control and Prevention listing of the sanitation scores for 186 cruise ships. The data are saved in the SHIPSANIT file. a. Find the mean and standard deviation of the sanitation ...Compare the z -scores to decide which of the following x values lie the greatest distance above the mean and the retest distance below the mean: a. x = 100, µ = 50, σ = 25 b. x = 1, µ = 4, σ = 1 c. x = 0, µ = 200, σ ...Consider the following two sample data sets, saved in the LM2_132 file: a. Construct a box plot for each data set. b. Identify any outliers that may exist in the two data sets.
Post your question