A hospital claims that the mean number of latex gloves used per day by all hospital employees is more than 18. From a random sample of 71 hospital employees it is found that the mean number of latex gloves used per day by the sampled workers is 23.7 with a standard deviation of 12.7. Test the hospitals claim at the 0.1 level of significance.
Step 2 of 5 : Find the value of the test statistic. Round your answer to three decimal places.