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Assuming that on average college students in the U.S. send 120 text messages per day. A...

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Statistics

Assuming that on average college students in the U.S. send 120text messages per day. A researcher wants to examine if the amountof text messages sent daily by UNC students differs from thenational average. The researcher took a sample of 64 UNC students,and finds that the mean number of texts per day is 126 with astandard deviation of 24. Use alpha .05

a) Is this a one-tail or two-tail test? Write appropriatehypotheses and assumptions.
b) Determine the degree of freedom and the critical value for thistest.
c) Calculate the standard error.
d) Calculate the test statistics and determine its P-value.
e) State your conclusion by comparing the critical value to thetest statistic and by comparing P to alpha.

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