Question 6 1 Point Which of the following best describes the P-value ? A The probability that Ho is true P value = 1 - a None of these. The risk that a significance test will reject Ho when it should be retained Question 7 1 Point In an experiment A we apply some treatment, then proceed to observe its effects on the subjects being studied. we measure the covariates and psuedoreplicate the data. C we observe and measure specific characteristics but don't attempt to modify the subjects being studied. D we observe and measure specific characteristics and attempt to modify the subjects being studied. Question 8 1 Point Which of the following is not true about the t-distribution? A The t-distribution has wider tails than the normal distribution. The t-distribution is symmetric about 1. C The t-distribution approaches the normal distribution as n -+ co . D The t-distribution curve differs depending on the degrees of freedom