Question

You may need to use the appropriate appendix table or technology to answer this question. An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler is asked to provide a rating for a certain airport. The ratings obtained from the sample of 50 business travelers follow. 6 4 7 8 7 6 6 3 3 8 10 4 8 7 8 7 5 9 4 8 4 3 8 5 6 4 4 4 8 4 5 5 2 5 9 9 9 4 8 9 9 5 9 7 8 3 10 7 9 6 Develop a 95% confidence interval estimate of the population mean rating for this airport. (Round your answers to two decimal places.)

52

likes
258 views

Answer to a math question You may need to use the appropriate appendix table or technology to answer this question. An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler is asked to provide a rating for a certain airport. The ratings obtained from the sample of 50 business travelers follow. 6 4 7 8 7 6 6 3 3 8 10 4 8 7 8 7 5 9 4 8 4 3 8 5 6 4 4 4 8 4 5 5 2 5 9 9 9 4 8 9 9 5 9 7 8 3 10 7 9 6 Develop a 95% confidence interval estimate of the population mean rating for this airport. (Round your answers to two decimal places.)

Expert avatar
Bud
4.6
96 Answers
To find the 95% confidence interval estimate of the population mean rating for this airport, we first need to find the sample mean and the sample standard deviation.

Given data:
n = 50
\bar{x} = \frac{1}{n} \sum_{i=1}^{n} x_i

Calculating the sample mean:
\bar{x} = \frac{1}{50} (6 + 4 + \cdots + 7 + 9 + 6)
\bar{x} = \frac{309}{50}
\bar{x} = 6.18

Next, we calculate the sample standard deviation as follows:
s = \sqrt{\frac{\sum_{i=1}^{n} (x_i - \bar{x})^2}{n-1}}

Calculating the sample standard deviation:
s = \sqrt{\frac{(6-6.18)^2 + (4-6.18)^2 + \cdots + (6-6.18)^2}{49}}
s = \sqrt{\frac{3.88}{49}}
s ≈ \sqrt{0.079184}
s ≈ 0.2815

Now, we calculate the margin of error ( E ) using the t-distribution and the formula:
E = t \cdot \frac{s}{\sqrt{n}}

For a 95% confidence level with n-1 = 49 degrees of freedom, the t-score is approximately 2.0096 .

Calculating the margin of error:
E = 2.0096 \cdot \frac{0.2815}{\sqrt{50}}
E ≈ 0.07986

Finally, we construct the 95% confidence interval estimate for the population mean rating by adding and subtracting the margin of error from the sample mean:
CI = \bar{x} \pm E
CI = 6.18 \pm 0.07986
CI = (6.10, 6.26)

Therefore, the 95% confidence interval estimate of the population mean rating for this airport is (6.10, 6.26) .

\boxed{(6.10, 6.26)}

Frequently asked questions (FAQs)
What is the equation of the logarithmic function whose graph passes through (4, 5) and has an asymptote at y = 2?
+
Math question: Find the length of the hypotenuse of a right triangle with legs measuring 5 cm and 12 cm.
+
What is the probability of rolling a sum of 9 with two dice (6-sided) without using one specific number?
+
New questions in Mathematics
-x+3x-2,si x=3
For a temperature range between 177 degrees Celsius to 213 degrees Celsius, what is the temperature range in degrees Fahrenheit.
An electrical company manufactures batteries that have a duration that is distributed approximately normally, with a mean of 700 hours and a standard deviation of 40 hours. Find the probability that a randomly selected battery has an average life of less than 810 hours.
Suppose 56% of politicians are lawyers if a random sample of size 564 is selected, what is the probability that the proportion of politicians who are lawyers will differ from the total politicians proportions buy more than 4% round your answer to four decimal places
The beta of a company is 1.51 while its financial leverage is 27%. What is then its unlevered beta if the corporate tax rate is 40%? (4 decimal places)
Solve this mathematical problem if 3/5 of a roll of tape measures 2m. How long is the complete roll? Draw the diagram
According to a survey in a country 27% of adults do not own a credit card suppose a simple random sample of 800 adults is obtained . Describe the sampling distribution of P hat , the sample proportion of adults who do not own a credit card
A study reports the following final notation: F (3, 32) = 9.50, p < .05. How many total participants were involved in this study? Group of answer choices 34 32 36
find x in the equation 2x-4=6
Two business partners have a bank balance of $17,942.00. After the first year their interest brings their balance to $18,928.91. What rate of interest is earned?
A triangular window has a base of 6 ft. and a height of 7 ft. What is its area?
Write the equation of the line that is parallel to y= 4x-7 and has a y- intercept at (0,5)
The annual real property tax liability for a residential property is $4302 and has been paid by the seller in advance of closing. Using the 30-day month/260-day year method what will be the tax proration entry on the settlement statement round to the nearest dollar for a closing on Oct. 26 if the buyer owns the day of closing? a. $3525 credit to the buyer and $777 debit to the seller b. $777 debit to the buyer and $3525 debit to the seller c. $777 credit to the buyer and $777 debit to the seller d. $3525 debit to the buyer and $3525 credit to the seller *Can anyone help with this? I am studying for my real estate exam and am having trouble with some of the calculations :)
Consider mixing 150 ml, 0.1M, HCI with 100 ml, 0.2M, KOH solution. Determine the pH of final solution.
If the mean of the following numbers is 17, find the c value. Produce an algebraic solution. Guess and check is unacceptable. 12, 18, 21, c, 13
the length of the fenced in area is to be 5 ft greater than the width and the total amount of fencing to be used is 89 ft find the width and length
A small box measures 10 in. by 4 in. by 6 in. high. Find the volume of the box.
Mark is gluing a ribbon around the sides of a picture frame. The frame is 11 inches long and 7 includes wide. How much ribbon does Mark need?
An export company grants a bonus of $100,000 pesos to distribute among three of its best employees, so that the first receives double the second and the latter receives triple the third. How much did each person receive?
A plant found at the bottom of a lake doubles in size every 10 days. Yeah It is known that in 300 days it has covered the entire lake, indicate how many days it will take to cover the entire lake four similar plants.