"STANDARD DEVIATION, SMALL SAMPLE SIZE, MEAN, VARIANCE. A normal or Gaussian distribution has the familiar bell-shaped distribution curve. The area under this curve represents the entire population. 68% or this area falls between ± 1 standard deviation, 95% of the area between ± 2 standard deviations and 99.7% of the area between ± 3 standard deviations. The most probable value, or mode, is the mean value X_MEAN. The steps used to enter the data and calculate these values are: 1) Type ? then (end esc) 0 (enter) to set everything to 0.0. 2) Type the first x-value (enter) N should equal 1 3) Type the second x-value and so on... N should equal 2, 3, ... Note: N is the number of X values (c) Copyright PCSCC, Inc., 1993 *** Answer(s) to problem *** The values of the variables at entry are set to the final values after the 10 x-values are entered. The mean X_MEAN is 10.92 and the standard deviation is 7.30. The large value of the s.d. relative to the mean suggests that this stockis very volatile (and speculative!). Type any key to exit. ||Calculate the mean and standard deviation for the stock price of OTC traded high-tech company 2-HIGH-4-ME, Inc. if its average monthly prices are: $2.47, 3.47, 2.89, 6.10, 10.50, 21.00, 17.80, 21.00, 14.50 and 9.50. Type comma key to see answer. Type (F2) to return to application file."
