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)
How many ways can a committee of 3 students be chosen from a group of 10 students?
+
Math Question: What is 42.5% expressed as a decimal?
+
Math question: Can you factor the given expression using factoring formulas? 2x^2 + 7x + 3.
+
New questions in Mathematics
2.5 / 21.85
The miles per gallon (mpg) for each of 20 medium-sized cars selected from a production line during the month of March are listed below. 23.0 21.2 23.5 23.6 20.1 24.3 25.2 26.9 24.6 22.6 26.1 23.1 25.8 24.6 24.3 24.1 24.8 22.1 22.8 24.5 (a) Find the z-scores for the largest measurement. (Round your answers to two decimal places.) z =
4. Show that if n is any integer, then n^2 3n 5 is an odd integer
If the midpoint of point A on the x=3 line and point B on the y=-2 line is C(-2,0), what is the sum of the ordinate of point A and the abscissa of point B?
41/39 - 1/38
-3(-4x+5)=-6(7x-8)+9-10x
What is 28 marks out of 56 as a percentage
The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a mean of $4.59 and a standard deviation of $0.10. Sixteen gas stations from the Bay Area are randomly chosen. We are interested in the average cost of gasoline for the 16 gas stations. 84. Find the probability that the average price for 30 gas stations is less than $4.55. a 0.6554 b 0.3446 c 0.0142 d 0.9858 e 0
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?
form a key for your lock containing the numbers 2 2 5 8 How many different keys can you form?
A person decides to invest money in fixed income securities to redeem it at the end of 3 years. In this way, you make monthly deposits of R$300.00 in the 1st year, R$400.00 in the 2nd year and R$500.00 in the 3rd year. Calculate the amount, knowing that compound interest is 0.6% per month for the entire period. The answer is 15,828.60
Use the power rule for logarithms to solve the following word problem exactly. If you invest $1, 000 at 5% interest compounded annually, how many years will it take before you have $2,000?
(2m+3)(4m+3)=0
What is 75 percent less than 60
-1%2F2x-4%3D18
ind the z-score for which 72% of the distribution's area lies between -z and z. -1.7417, 1.7417 -1.1538, 1.1538 -1.0803, 1.0803 -2.826, 2.826
Calculate the difference between 407 and 27
Cuboid containers (open at the top) should be examined with regard to their volume. The figure below shows a network of such containers (x ∈ Df). Determine a function ƒ (assignment rule and definition area D) that describes the volume of these containers and calculate the volume of such a container if the content of the base area is 16 dm². Show that this function f has neither a local maximum nor a global maximum
y’’ -4y’ +4y = (12x^2 -6x)e^2x Y(0)= 1 Y’(0)=0 Y(x)=c1y1+c2y2+yp
f(r) = 1/r+9 find f(x^2) + 1