At recent times, the airlines have received complaints from passengers regarding their e-tickets, particularly when connecting flights and a change of airlines were involved. To investigate the problem an independent watchdog agency contacted a random sample of 20 airports and collected information on the number of complaints the airport had with e-tickets for the month of March. The information is reported below:

14 12 14 15 16 15 12 14 12 13 14 13 13 12 16 13 15 10 14 13

At the .05 significance level can the watchdog agency conclude the mean number of complaints per airport is less than 15 per month?

The assumptions for the one-sample t-test are

Measurements are interval scale or better

Observations are independent of each other

The scores in the parent population are normally distributed.

It is reasonable to conclude that the population follows a normal distribution.

Null Hypothesis:

H0: m = 15

H1: m < 15

Since the sample size is (n = 20 < 30) small, we can test the above hypothesis by the use of small sample test (t-test) as follows:

**Test Statistic:**

t =

We obtain the result using Minitab

**One-Sample T: C1 **

Test of mu = 15 vs < 15

95% Upper

Variable N Mean StDev SE Mean Bound T P

C1 20 13.500 1.504 0.336 14.082 -4.46 0.000

**Conclusion:**

At α=0.05, since the p value is < 0.05, we reject the null hypothesis, thus we conclude that the mean number of complaints per airport is less than 15 per month.

Assignment Writing Help

- Science Assignment Help
- Math Assignment Help
- Chemistry Assignment Help
- Physics Assignment Help
- Biology Assignment Help
- Psychology Assignment Help
- History Assignment Help
- Geography Assignment Help
- English Assignment Help
- Humanities Assignment Help
- Nursing Assignment Help
- Social Science Assignment Help
- Arts and Architecture Help
- Statistics Assignment Help
- Law Assignment Help
- Computational Mathematics Assignment Help

Engineering Assignment Services

- Programming Assignment Help
- Database Help
- Data Structure Assignment Help
- Operating Systems Assignment Help
- Computer Network Assignment Help
- UML Diagram Assignment Help
- IT Assignment Help
- Game Programming Help
- Computer Science Assignment Help
- Information Systems Assignment Help
- Chemical Engineering Assignment Help
- Civil Engineering Assignment Help
- Electrical, Electronics Help
- Mechanical Engineering Assignment Help
- Petroleum Engineering Assignment Help
- Biochemical and Biotechnology Help

Do My Assignment Help

- Accounting Assignment Help
- Finance Assignment Help
- Economics Assignment Help
- Marketing Assignment Help
- Human Resources Assignment Help
- Operations Management Assignment Help
- Strategy and Planning Help
- Project Management Help
- Case Studies Writing Help
- Political science
- Referencing Help
- Assignment Help Websites
- Online Assignment Help
- Do My Assignment
- Do My Homework

Write My Essay Services

- Essay Writing Help
- Business Essay Writing Help
- Assignment Writing Services
- Plagiarism Free Essay Writing
- Essay Editing Service
- Dissertation Writing Services
- Thesis Writing Help
- Custom Writing Help
- Write My Essay
- Write My Paper
- Paper Writing Service
- Academic Writing Help
- College Essay Writing
- Cheap Essay Writing