34 Confidence Intervals
... following samples taken from a Normal distribution: (a) x 15, 3, n 5 (b) x 15, 3, n 20 2. Write down the width of the intervals found in 1(a) and (b). By what factor did the width of the c.i. change from (a) to (b) and why did it change by this ...
... following samples taken from a Normal distribution: (a) x 15, 3, n 5 (b) x 15, 3, n 20 2. Write down the width of the intervals found in 1(a) and (b). By what factor did the width of the c.i. change from (a) to (b) and why did it change by this ...
Chapter 1 Collecting Data in Reasonable Ways
... groups that are equivalent, so that the subjects in each experimental group are as much alike as possible. This ensures that the experiment does not favor one experimental condition (playing Unreal Tournament 2004 or Tetris) over another. 1.31 (a) Allowing participants to choose which group they wa ...
... groups that are equivalent, so that the subjects in each experimental group are as much alike as possible. This ensures that the experiment does not favor one experimental condition (playing Unreal Tournament 2004 or Tetris) over another. 1.31 (a) Allowing participants to choose which group they wa ...
Linear regression
... • Standard error is stanard deviation, it allows us to calculate z-scores and therefore area (probability) under the curve for certain region, • Any point estimator is an estimation and will contain error, • This error can be minimized by selecting large sample from the population from which to est ...
... • Standard error is stanard deviation, it allows us to calculate z-scores and therefore area (probability) under the curve for certain region, • Any point estimator is an estimation and will contain error, • This error can be minimized by selecting large sample from the population from which to est ...
Chapter Nine
... c. The critical point(s) divides the whole area under a distribution curve into rejection and nonrejection regions. d. The significance level, denoted by α, is the probability of making a Type I error, that is, the probability of rejecting the null hypothesis when it is actually true. e. The nonreje ...
... c. The critical point(s) divides the whole area under a distribution curve into rejection and nonrejection regions. d. The significance level, denoted by α, is the probability of making a Type I error, that is, the probability of rejecting the null hypothesis when it is actually true. e. The nonreje ...
