To test the new design, QA has taken a sample of 13 KX2’s and clocked their speed. The results of this test are shown below.
Is it safe to conclude that the new design for the KX2 has a significantly higher speed with a confidence of 1%?
DATA
1 18.4
2 19.3
3 20.5
4 18.6
5 17.8
6 21.0
7 19.4
8 19.2
9 18.9
10 15.9
11 17.7
12 20.5
13 19.1
The data is included in the Excel file in the Background page.
Assignment Expectations
Answer questions with clarity and show the detailed steps for calculation. Turn in your answers by module due date.
Background:
Review this information from:
Wikipedia (n.d.). Student’s t-test, retrieved from https://en.wikipedia.org/wiki/Student%27s_t-test
Here are some videos on the Khan Academy website that explains hypothesis testing and using small samples.
What is hypothesis testing? Review these Khan Academy Videos:
https://www.khanacademy.org/video/hypothesis-testing-and-p-values?topic=statistics
https://www.khanacademy.org/video/one-tailed-and-two-tailed-tests?topic=statistics
What is a t-test? Review these Khan Academy videos
Z-statistic v t-statistic: https://www.khanacademy.org/video/z-statistics-vs–t-statistics?topic=statistics
How to do a t-test: https://www.khanacademy.org/video/small-sample-hypothesis-test?topic=statistics
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