The Texas Department of Transportation built hundreds of bridges in 2018. To check the average cost to build a bridge, a random sample of n = 10 bridges was chosen. The mean and standard deviation for the sample are $12,100,000 (12.1 M) and $150,000 (0.15 M), respectively. The department claims that the average bridge building cost is $12,000,000 (12M). Normality is assumed for the cost. Use the sample data to test that the department is correct. Use a = 0.05. a. State the appropriate hypotheses. b. Calculate the value of the test statistic. c. Determine the rejection region. d. What is your conclusion? Interpret your conclusion..
The Texas Department of Transportation built hundreds of bridges in 2018. To check the average cost to build a bridge, a random sample of n = 10 bridges was chosen. The mean and standard deviation for the sample are $12,100,000 (12.1 M) and $150,000 (0.15 M), respectively. The department claims that the average bridge building cost is $12,000,000 (12M). Normality is assumed for the cost. Use the sample data to test that the department is correct. Use a = 0.05. a. State the appropriate hypotheses. b. Calculate the value of the test statistic. c. Determine the rejection region. d. What is your conclusion? Interpret your conclusion..
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Need help with part d conclusion
![The Texas Department of Transportation built hundreds of bridges in 2018. To check the average cost to build a bridge, a random sample of \( n = 10 \) bridges was chosen. The mean and standard deviation for the sample are $12,100,000 (12.1 M) and $150,000 (0.15 M), respectively. The department claims that the average bridge building cost is $12,000,000 (12M). Normality is assumed for the cost. Use the sample data to test that the department is correct. Use \( \alpha = 0.05 \).
a. State the appropriate hypotheses. [Text Redacted]
b. Calculate the value of the test statistic. [Text Redacted]
c. Determine the rejection region. [Text Redacted]
d. What is your conclusion? Interpret your conclusion. [Text Redacted]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F327c4acc-aab0-4600-9811-c42079067cf3%2Fca614202-2621-4581-8583-3f42da8b26e0%2F8juyqqj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The Texas Department of Transportation built hundreds of bridges in 2018. To check the average cost to build a bridge, a random sample of \( n = 10 \) bridges was chosen. The mean and standard deviation for the sample are $12,100,000 (12.1 M) and $150,000 (0.15 M), respectively. The department claims that the average bridge building cost is $12,000,000 (12M). Normality is assumed for the cost. Use the sample data to test that the department is correct. Use \( \alpha = 0.05 \).
a. State the appropriate hypotheses. [Text Redacted]
b. Calculate the value of the test statistic. [Text Redacted]
c. Determine the rejection region. [Text Redacted]
d. What is your conclusion? Interpret your conclusion. [Text Redacted]
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