Hypothesis Test Using a t Test for the Mean t Test for the Hypothesis of the Mean Data Null Hypothesis U= 10000 Level of Significance 0.05 Sample Size 138 Sample Mean 8882.64 Sample Standard Deviation 812.26 Intermediate Calculations Standard Error of the Mean 69.1442 Degrees of Freedom 137 t Test Statistic -16.1599 Two-Tail Test Lower Critical Value 1.9774 Upper Critical Value 1.9774 p-Value 0.0000 Reject the null hypothesis The hypothesis analysis in Table 4 shows the sample input values of: . The hypothesis value of $10,000 for the mean of total charges . The sample mean of $8,882.64 . The sample standard deviation of $812.26 . The sample size N = 138The ratio of the sample standard deviation to the sample mean was _______ . O a) About 1/10 0 '3) About 1/2 0 C) About 1/6 0 d) About 1/4