Loudoun County Public Schools



5334000-194310HW: Review of Normal Distributions Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams and standard deviation 550 grams. Those weighing less than 2500 grams are considered to be of low birth weight. Sketch a normal distribution below to include the empirical rule values. Shade in the region whose area corresponds to the probability that a baby will have a low birth weight. Determine the proportion of babies born with a low birth weight using the calculator. Be sure to include the command used. What proportion of babies would the normal distribution predict as weighing more than 10 pounds (4536 grams) at birth? Determine the probability that a baby weighs between 3000 and 4000 grams at birth. -419100151130 Mrs. Blubaugh’s son was born with a weight of 8 lbs 4 oz (3737.25 grams). Determine the corresponding percentile for his weight. Determine a baby’s weight for the 40th and 90th percentile. The braking distance for a Krazy-Car traveling at 50 mph is normally distributed with a mean of 50 ft. and a standard deviation of 5 ft. Answer the following using the empirical rule (68-95-99.7).What is the likelihood a Krazy-Car will take more than 65 ft. to stop?What is the probability a Krazy-Car will stop between 45 ft. and 55 ft.?What percent of the time will a Krazy-Car traveling at 50 mph stop between 35 and 55 ft.?What is the probability a Krazy-Car will require less than 50 ft. or more than 60 ft. to stop? ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download