statistics help

You wish to test the following claim (Ha) at a significance level of a = 0.05. Ho: p = 57.9 Ha: p # 57.9 You believe the population is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: data 49.7 78.7 75 62.8 66.2 66.2 58.9 58.3 57.3 58.3 58.6 50.9 57.3 77.5 What is the critical value for this test? (Report answer accurate to three decimal places.) critical value = + What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic =