# Question: Automobile pollution In a random sample of 340 cars driven

Automobile pollution: In a random sample of 340 cars driven at low altitudes. 46 exceeded a threshold for the amount of particulate pollution. In a random sample of 85 cars driven at high altitudes. 21 exceeded a threshold for the amount of particulate pollution. Construct a 994 confidence interval for the difference between the proportions for high-altitude and low-altitude vehicles.

**View Solution:**## Answer to relevant Questions

Why is it necessary for all values in the confidence interval to be positive to conclude that pi > P2? What would have to be true to conclude that pi < P2? The following TI-84 plus calculator display Presents the results of a hypothesis test for the difference between two proportions. The sample sizes are n1 = 125 and n2 = 150 a. Is this a left-tailed test, a right-tailed ...Medical researchers conducted a study to determine whether treadmill exercise could improve the walking ability of patients suffering from claudication. which is pain caused by insufficient blood flow to the muscles of the ...For each of the five factors, test the null hypothesis that the population proportions are equal against the alternate hypothesis that they are not equal. Find the P-value for each test. Can you conclude that the distribution of boys differs from the binomial a hypothetical sample of 200 families, each with four children, was selected, and the number of boys was recorded for each. The results are presented ...Post your question