Find the value of the test statistic. Claim: For adult females, the mean of their white blood cell counts is equal to 8.00. The random sample of 40 adult females has white blood cell counts with a mean of 7.15 and a standard deviation of 2.28. (The population standard deviation equation is not known.) A. -2.358 B. 4.752 C.-7.499 D.1.765 E.3.176.