a. Sketch a Normal curve that has mean 30 and standard deviation 10. b. On the same x axis, sketch a Normal curve that has mean 30 and standard deviation 5.

Draw a normal curve with µ= 70 and o = 19. Label the mean and the inflection points. ..... Choose the correct graph of the normal curve below. A. В. OC. 51 70 89 70 89 108 32 51 70

Gestation Periods of Humans. Gestation periods of humans have a mean of 266 days and a standard deviation of 16 days. Let y denote the variable "gestation period" for humans.a. Find the standardized variable corresponding to y.b. What are the mean and standard deviation of the standardized variable?c. Obtain the z-scores for gestation periods of 227 days and 315 days. Round your answers to two decimal places.d. Interpret your answers in part (c).

Assume that a normal distribution of data has a mean of 24 and a standard deviation of 5.Use the empirical rule to find the percentage of values that lie below 9.