Only numbers 7,8 If we draw 1,000 samples of size 100 from a population and comp
ID: 80365 • Letter: O
Question
Only numbers 7,8 If we draw 1,000 samples of size 100 from a population and compute the mean of each sample, the distribution of sample means will be: A) approximately normal. B) approximately normal only if the scores in the population are normally distributed. C) negatively skewed. D) positively skewed. As the size of the sample increases, the standard error of the mean: A) becomes smaller. B) remains the same. C) becomes larger. D) cannot be determined from the information given If we were able to measure the entire population, the standard error of the mean would be: A) zero. B) 1.0. C) plus infinity. D) equal to the standard deviation of the raw scores. In hypothesis testing, which of the following is assumed to be true in order to find the p value? A) The alternative hypothesis B) The null hypothesis C) Both of the above D) None of the above A Type I error occurs when the researcher: A) rejects a false null hypothesis. B) rejects a true null hypothesis. C) retains a false null hypothesis. D) retains a true null hypothesis A Type II error occurs when the researcher: A) rejects a false null hypothesis. B) rejects a true null hypothesis. C) retains a false null hypothesis. D) retains a true null hypothesis. Using the .01, rather than the .05, criterion of significance, has which effect on the probability of making a Type l error? A) it gets smaller. B) it gets larger. C) it stays the same. D) cannot be determined from the information given The main advantage of a one-tailed test, compared to a two-tailed test is that: A) only half the calculation is required. B) only half of the calculated t value is required. C) there is only half the risk of a Type I error. D) a smaller critical value must be exceeded.Explanation / Answer
Using the 0.01 rather than the 0.05 criterion of significance, he probability of making type 1 error gets smaller.
if the consequences of type I error are threatening/ expenive/seroius then a smaller significance level is desirable.
The main advantage of a one tailed test, compared to a two tailed test is at a smaller critical value must be exceeded.
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