The claim is that the white blood cell counts of adult females are normally distributed, with a standard deviation equal to 1.681.68. a random sample of 3939 adult females has white blood cell counts with a mean of 7.237.23 and a standard deviation of 1.951.95. find the value of the test statistic.
the population standard deviation, σ = 1.68, the sample standard deviation, s = 1.95, the sample mean =7.23, and the sample size, n = 39.The test statistics is given by T=(n - 1) (s / σ)² = (39 - 1) (1.95 / 1.68)² = 38 (1.35)= 51.196
