(a) te the value of the test statistic. A sample of 58 items provided a mean of x = 13 and a standard deviation of s = 6.3. The hypotheses are given below. Hol = 14 H: U # 14 A t test statistic will be used when the standard deviation is calculated from a sample instead of the population, Recall that the test statistic, t, for a hypothesis is calculated as follows where x is the sample mean, Ho is the hypothesized population mean, s is the population standard deviation, and n - he sample size. x - HO t = The value for Mo is the hypothesized population mean we are testing for. Here, we have Ho . There was a sample of 58 items given, so we have n =