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EDCO 735 / EDCO735 QUIZ 2

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EDCO 735 / EDCO735 QUIZ 2 2nd attempt The standard error is related to all of the following except: causal inference dependent on sample size is smaller with a larger sample i ... nvolves the confidence interval Calculating the sample standard deviation always makes use of: variance random sample convenience sample nominal level of measurement Question 3 3 / 3 pts Outliers are defined by: where the scores or values fall on a known (t, z, F) distribution subtracting one from the sample size the square root of variance dividing the SS by the mean Outliers in the sample are defined by: how many standard deviations there score is from the mean a measure of dispersion how far any given score in the population can be expected to be from the mean the square root of variance A two-tailed outlier for the t distribution must have a t score equivalent to the: highest 2.5% or lowest 2.5% of the t distribution highest 5% or lowest 5% of the t distribution only the highest 5% of the t distribution only the lowest 5% of the t distribution For every statistic (e.g., mean) a researcher calculates in her sample, she is estimating that same value in the: population second sample experimental sample distribution df are used because: Correct Answer samples underestimate population variance sample distributions are skewed samples underestimate SS samples provide the point estimate Warner - Section 2.5 The variations of the t distribution are especially noticeable when: sample sizes are small the sample is biased the population is normal the sample is normal As sample size increases while all other things are constant, the confidence interval: decreases increases remains constant it can increase or decrease The t distribution and the z distribution are all of the following all of the time except: Correct Answer platykurtic discovered or developed by statisticians have values associated with percentiles symmetrical [Show More]

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