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Sagot :
The Python method that is used to perform a test of hypothesis for a population mean with an unknown population standard deviation is d. ttest_1samp(dataframe, null hypothesis value).
- A t-test is normally applied when the population standard deviation is not known. The researcher will use the sample standard deviation.
- While the z-test can also be used in Python to perform hypothesis testing with a known population standard deviation and a sample size that is larger than 50, only the t-test can be applied with an unknown population standard deviation or a sample size less than 50.
Thus, the only Python method to carry out hypothesis testing with unknown population standard deviation is the t-test, which is given in option d.
Learn more about hypothesis testing at https://brainly.com/question/15980493
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