The sample data below represent the number of late and on time flights for three airlines. Airline
Question:
The sample data below represent the number of late and on time flights for three airlines.
Airline | |||
---|---|---|---|
Flight | 1 | 2 | 3 |
Late | 15 | 27 | 32 |
On Time | 285 | 273 | 368 |
(a)Formulate the hypotheses for a test that will determine if the population proportion of late flights is the same for all three airlines.
H0: p1 = p2 = p3 Ha: All population proportions are not equal.
H0: Not all population proportions are equal. Ha: p1 = p2 = p3
H0: All population proportions are not equal. Ha: p1 = p2 = p3
H0: p1 = p2 = p3 Ha: Not all population proportions are equal.
(b)Conduct the hypothesis test with a 0.05 level of significance.
Find the value of the test statistic. (Round your answer to three decimal places.)
Find the p-value. (Round your answer to four decimal places.)
State your conclusion.
Reject H0. We conclude that not all of the population proportions are equal.
Reject H0. We cannot conclude that not all of the population proportions are equal.
Do not reject H0. We conclude that not all of the population proportions are equal.
Do not reject H0. We cannot conclude that not all of the population proportions are equal.
(c)Compute the sample proportion of late flights for each airline.
p1=
p2=
p3=
What is the overall proportion of late flights for the three airlines?
p =