Mathematics, 18.07.2019 19:20 sammizwang

We use the t distribution for the statistical inference of the population mean when the underlying population standard deviation is not known. under the assumption that the population is normally distributed, find tα/2,df for the following scenarios. use table 2. (round your answers to 3 decimal places.) tα/2,df
a. a 90% confidence level and a sample of 28 observations.
b. a 95% confidence level and a sample of 28 observations.
c. a 90% confidence level and a sample of 15 observations.
d. a 95% confidence level and a sample of 15 observations

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We use the t distribution for the statistical inference of the population mean when the underlying p...