Purchase Solution

Would a new sample cast doubt on the reported average length of a flight of 299 miles?

Not what you're looking for?

Ask Custom Question

The average length of a flight by regional airlines in the United States has been reported as 299 miles. If a simple random sample of 30 flights by regional airlines were to have x = 314.6 miles and s = 42.8 miles, would this tend to cast doubt on the reported average of 299 miles? Use a two-tail test and the 0.05 level of significance in arriving at your answer.

Purchase this Solution
Solution Summary

The solution provides step by step method for the calculation of t test. Formula for the calculation and interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data. An answer is provided in Excel.

Solution Preview

Please see the attachments.

Statistics
The average length of a flight by regional airlines in the United States has been reported as 200 miles. If a simple random sample of 30 flights by regional airlines were to have x = 314.6 miles and s = 42.8 miles, would this tend to cast doubt on the reported average of 299 miles? Use a two-tail test and the ...

Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

View More Free Quizzes
Related BrainMass Solutions

  • Operating Income - Air Frisco

    Average one-way fare per passenger $ 299 Commission at 10% of $299 30* Net cash to Air Frisco per ticket $ 269 Average number of passengers per flight × 175 Revenues per flight ($269 × 175) $47,075 Food and

  • Confidence Interval

    Suppose a large airline wants to estimate its average number of unoccupied seats per flight over the past year. 225 flight records are randomly selected and the number of unoccupied seats is noted with a sample mean of 11.6 seats and a standard deviation

  • Hypothesis testing and probability problems

    A consumer group who surveyed a large number of air travelers found that only 145 out of 165 people who lost luggage on that airline were reunited with the missing items by the next day. Does this cast doubt on the airlines claim?

  • General Statisticw

    We conclude that the mean length of imprisonment for motor-vehicle theft offenders in Sydney does NOT differ from the national mean in Australia 9.42 In 2000, the average car in the US was driven 11.9 thousand miles, as reported by the US Federal

  • z score based percentage and confidence interval

    Health Insurers are putting pressure on hospitals to reduce the average "length of stay" of their patients. A random sample of 20 hospitals in one state had a mean "length of stay" for women of 3.9 days, and a standard deviation of 2.1 days.

  • Regression analysis

    How is the cost of a plane flight related to the length of the trip? The following table shows the average round-trip airfare paid by American Airline customers on each of 18 heavily traveled US air routes in 1996.

  • Hypothesis Testing

    Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 9 recent mileages of Citrus cars was taken.

  • break even, what if, high-low

    How many round trips are needed so that Michael can draw a salary of $110,000 and still not show a loss? c. What is the average before-tax profit of a round trip flight in 2010? d.

  • Examples of Statistical Techniques in Business and Economics

    The present method requires 42.3 minutes, on the average, to assemble a cart. The mean using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes.

View More Related Solutions