Hypothesis Test Using a t Test for the Mean t Test for the Hypothesis of the Mean Data Null Hypothesis LL= 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 hypothesisWhat did we learn from Table 4? O a) The t Test statistic was higher than the upper critical value 0 bl The p-value was very high compared to the level of significance O Cl Drug charges the main area of costs 0 d) It is unlikely that the mean is $10,000 for total charges