Consider the following hypotheses: H₀:= 8 H_A: 8 The population is normally distributed. A sample produces the following observations:(You may find it useful to reference the appropriate table:ztableorttable)

6

9

8

7

7

11

10

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a.Find the mean and the standard deviation.(Round your answers to 2 decimal places.)

b.Calculate the value of the test statistic.(Round final answer to 2 decimal places.)