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 definition of the circumcenter of a triangle?
+
Find the length of the hypotenuse in a right triangle with one leg measuring 7 units and the other leg measuring 24 units.
+
Math question: Solve the inequality 3x + 4 > 20.
+
New questions in Mathematics
calculate the derivative by the limit definition: f(x) = 6x^3 + 2
How many percent is one second out a 24 hour?
Find the equation of the normal to the curve y=x²+4x-3 at point(1,2)
Write 32/25 as a percent
58+861-87
If f(x) = 3x 2, what is the value of x so that f(x) = 11?
-3x 2y = -6; -5x 10y = 30
(-5/6)-(-5/4)
Solve this mathematical problem if 3/5 of a roll of tape measures 2m. How long is the complete roll?
If 0101, what is the binary representation of the 4x16 decoder output?
3.24 ÷ 82
Find the minimum value of the function y = -4 x3 + 60 x2 -252 x + 8 for values of x between x = 0 and x = 9 Enter the value of the function, not the value of x
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
a coffee shop has 9 types of creamer and 11 types of sweetener. In how any ways can a person make their coffee?
Today a father deposits $12,500 in a bank that pays 8% annual interest. Additionally, make annual contributions due of $2,000 annually for 3 years. The fund is for your son to receive an annuity and pay for his studies for 5 years. If the child starts college after 4 years, how much is the value of the annuity? solve how well it is for an exam
Find the symmetric point to a point P = (2,-7,10) with respect to a plane containing a point Po = (3, 2, 2) and perpendicular to a vector u = [1, -3, 2].
A grain silo has a height of 8.8m with a 11.4m diameter. If it is filled 0.5% of it's volume, how much grain (m^3) is stored in the silo? (0 decimal places)
Dano forgot his computer password. The password was four characters long. Dano remembered only three characters: 3, g, N. The last character was one of the numbers 3, 5, 7, 9. How many possible expansions are there for Dano's password?
Solve the system of equations by the addition method. 0.01x-0.08y=-0.1 0.2x+0.6y=0.2
Find the rule that connects the first number to the second number of each pair. Apply the rule to find the missing number in the third pair. (18 is to 22) (54 is to 26) (9 is to ?)