Get the most out of your questions with IDNLearn.com's extensive resources. Ask anything and receive prompt, well-informed answers from our community of knowledgeable experts.
Sagot :
Answer:
The t-test statistic is [tex]t = -0.697[/tex]
Step-by-step explanation:
The test statistic is:
[tex]t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the expected mean, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.
The sample standard deviation is 7.309.
This means that [tex]\sigma = 7.309[/tex]
Adam reads that the average speed that cars drive on the highway is 65 mph.
This means that [tex]\mu = 65[/tex]
60.5, 63.2, 54.7, 51.6, 72.3, 70.7, 67.2, and 65.4 mph.
8 values, so [tex]n = 8[/tex]
The sample mean is:
[tex]X = \frac{60.5 + 63.2 + 54.7 + 51.6 + 72.3 + 70.7 + 67.2 + 65.4}{8} = 63.2[/tex]
Test statistic:
[tex]t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]t = \frac{63.2 - 65}{\frac{7.309}{\sqrt{8}}}[/tex]
[tex]t = -0.697[/tex]
The t-test statistic is [tex]t = -0.697[/tex]
Thank you for using this platform to share and learn. Don't hesitate to keep asking and answering. We value every contribution you make. Thank you for trusting IDNLearn.com with your questions. Visit us again for clear, concise, and accurate answers.
