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in performing a hypothesis test where the null hypothesis is that the population mean is 4.8 against the alternative hypothesis that the population mean is

in performing a hypothesis test where the null hypothesis is that the population mean is 4.8 against the alternative hypothesis that the population mean is not equal to 4.8, a random sample 0f 25 items is selected. the sample mean is 4.1 and the sample standard deviation is 1.4. it can be assumed that the population is normally distributes. The degrees of freedom associated with this are?

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