Pollution and altitude:In a random sample of 340 cars driven at low altitudes, 45 of them exceeded a standard of 9

grams of particulate pollution per gallon of fuel consumed. In an independent random sample of 86

cars driven at high altitudes, 17

of them exceeded the standard. Can you conclude that the proportion of high-altitude vehicles exceeding the standard is greater than the proportion of low-altitude vehicles exceeding the standard? Let

p1

denote the proportion of low-altitude vehicles exceeding the standard and

p2

denote the proportion of high-altitude vehicles exceeding the standard. Use the a= 0.05 level of significance and the

P

-value method with the TI-84 Plus calculator.

Part 1 of 4

State the appropriate null and alternate hypotheses.

:H0 :H1 This hypothesis test is a (Choose one) test. left, right , two tailed test?