It has been claimed from previous studies that the average diameter of ball bearings from this manufacturing process is

Business, Finance, Economics, Accounting, Operations Management, Computer Science, Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Algebra, Precalculus, Statistics and Probabilty, Advanced Math, Physics, Chemistry, Biology, Nursing, Psychology, Certifications, Tests, Prep, and more.
Post Reply
answerhappygod
Site Admin
Posts: 899604
Joined: Mon Aug 02, 2021 8:13 am

It has been claimed from previous studies that the average diameter of ball bearings from this manufacturing process is

Post by answerhappygod »

It has been claimed from previous studies that the averagediameter of ball bearings from this manufacturing process is 2.30cm. Based on the sample of 50 that you collected, is there evidenceto suggest that the average diameter is greater than 2.30 cm?Perform a hypothesis test for the population mean at alpha =0.01.
~Define the null and alternative hypothesis for this test inmathematical terms and in words.
~Report the level of significance.
~Include the test statistic and the P-value. See Step 3 in thePython script. (Note that Python methods return two tailedP-values. You must report the correct P-value based on thealternative hypothesis.)
~Provide your conclusion and interpretation of the results.Should the null hypothesis be rejected? Why or why not?
INFO:
z-test hypothesis test for population meantest-statistic = 2.73two tailed p-value = 0.006390% confidence interval (rounded) = (2.4, 2.63)
99% confidence interval (rounded) = (2.33, 2.69)
Thank you!
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!
Post Reply