Given the following hypotheses: H0: mu = 480 H1: mu != 480 A random sample of 14 observations is selected from a normal population. The sample mean was 488 and the sample standard deviation 8. Using the 0.10 significance level:3.6. Using the 0.05 significance level: a) the interval ( , ) Note: Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places. b) Compute the value of the test statistic.
Added by Jonathan P.
Step 1
Since we are conducting a two-tailed test at the 0.05 significance level, we need to find the critical value for a 0.025 area in each tail of the t-distribution. With 14 - 1 = 13 degrees of freedom, we can look up the critical value in a t-distribution table or Show more…
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