Here are the statistics for the anxiety scale again, with means and standard deviations for the sample (M= 33.56, SD = 19.40) and for the population (µ = 14.20, o = 9.70). With their sample size of N = 92, the researchers reported the following results from a z test: “z= 19.15, p< .05." What can we conclude from the statistics that the researchers reported? O A. The difference between the sample mean and the population mean is statistically significant. O B. The researchers rejected the null hypothesis. O C. The sample of children with AS had significantly higher anxiety, on average, than the population.

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