Help find test statistic

Exercise 12-23 Algo Consider the following sample data with mean and standard deviation of 18.5 and 71, respectively. (You may find It useful to reference the appropriate table: chl-square table or F table) Class Frequency Less than 10 26 10 up to 20 85 20 up to 30 68 30 or more 13 n = 184 a. Using the goodness-of-fit test for normality, specify the competing hypotheses in order to determine whether or not the data are normally distributed. Ho: The data are normally distributed with a mean of 18.5 and a standard deviation of 7.1.: HA: The data are not normally distributed with a mean of 18.5 and a standard deviation of 7.1. O Ho: The data are not normally distributed with a mean of 18.5 and a standard deviation of 7.1.; HA: The data are normally distributed with a mean of 18.5 and a standard deviation of 7.1. b-1. Calculate the value of the test statistic. (Round the z value to 2 decimal places, all other Intermediate values to at least 4 decimal places and final answer to 3 decimal places.)