A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the following observations on the area of scleral lamina (mm2) from human optic nerve heads: 2.72 2.71 2.64 3.94 2.31 2.64 3.86 4.29 3.85 4.29 3.44 4.62 2.34 3.66 2.79 3.57 2.92 IЛ USE SALT (a) Calculate Ex, and Σx². Σχο Σχι 2 = = mm² 4 mm (b) Use the values calculated in part (a) to compute the sample variance s² and then the sample standard deviation s. (Round your answers to four decimal places.) $2 S = mm4 mm²

3) Calculate the area under the standard normal curve to the left of these values:   Z = 1.88 Z = 0.63 Z = 1.48 Z = 2.72

Consider the sample of n = 8 scores whose frequency distribution histogram is shown here. FREQUENCY 2 1 0 5 4 1 2 3 SCORE The total number of boxes in the histogram = 4 5 boxes. ?

Scores on an accounting exam ranged from 44 to 92, with quartiles Q1 = 49.50, Q2 = 67.5, and Q3 = 71.00. (a) Select the correct box plot for the given data.  BoxPlot A BoxPlot B BoxPlot C         multiple choice 1 BoxPlot A BoxPlot B BoxPlot C  (b) Describe its shape (skewed left, symmetric, skewed right). multiple choice 2 The distribution is skewed right. The distribution is symmetric. The distribution is skewed left.