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11. Chebyshev's Theorem states that the percentage of measurements in a data set that fall within two standard deviations of their mean is: a) 75% b) At least 75% ) 88.89% d) At least 88.89%. Answer= 12. Normally distributed data are referred to as: a) Bell-shaped b) Asymmetrical () Skewed d) Peaked Answer= 13. What is the correct decision in a hypothesis if the data produce a t-statistic that is in the critical region? a) Reject Ho b) Fail to reject Ho Reject H d) Fail to reject H, Answer= 14. A medical researcher is curious about the blood pressure of patients at SQUH. The entire group of patients is an example of a: a) Parameter b) Statistic