The paper “The Effect of Temperature and Humidity on Size of Segregated Traffic Exhaust Particle Emissions” (Atmospheric Environment : 2369–2382) gave the following summary quantities for a measure of traffic flow (vehicles/second) during peak traffic hours at a particular location recorded daily over a long sequence of days:
Based on these summary quantities, do you think that the distribution of the measure of traffic flow could have been approximately normal? Explain your reasoning.
Answer to relevant QuestionsThe article “Men, Women at Odds on Gun Control” (Cedar Rapids Gazette, September 8, 1999) included the following statement: “The survey found that 56 percent of American adults favored stricter gun control laws. ...Consider the population of batteries made by a particular manufacturer. The following density curve represents the probability distribution for the variable x = lifetime (in hours): Shade the region under the curve ...Let z denote a variable that has a standard normal distribution. Determine each of the following probabilities: Consider babies born in the “normal” range of 37–43 weeks gestational age. The paper referenced in Example 7.13 (“Fetal Growth Parameters and Birth Weight: Their Relationship to Neonatal Body Compo- sition,” ...A gasoline tank for a certain car is designed to hold 15 gallons of gas. Suppose that the variable x 5 actual capacity of a randomly selected tank has a distribution that is well approximated by a normal curve with mean 15.0 ...
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