20) You can have a small sample and a large standard deviation. You know this me

Question

20) You can have a small sample and a large standard deviation. You know this means: (2pts) a) You can reject the null hypothesis b) Your study is not statistically significant c) You lack homogeneity d) None of the above

21) You are reading a study which uses an alpha of 0.05. You know this means: (2pts) a) the study is statistically significant b) there is a 95% chance of making a type one error c) there is a 5% chance of making a type one error d) the statistically significant results are clinically significant

22) All students who take a statistics course at Brockport are selected to be subjects of a research study. They are asked to fill out a survey including demographic information which is then used to describe the “typical Brockport college student.” What kind of sampling is this? (2pts) a) stratified sampling b) simple random sampling c) convenience sampling d) cluster sampling

23) Your study reports that individuals wearing pink shirts are significantly more likely to get hit by a car when in fact this is not true. This is an example of: (2pts) a) a type I error b) a type II error c) a nonrepresentative sample d) inadequate sample size

Explanation / Answer

Question 20 If we take a small sample and a large standard deviation it may mean that we will lack homogeneity becuase standard deviation is large. Option C

Question 21. If alpha here is 0.05 that means there is a 5% chance of making a type one error. Option C

Question 22 Here the sampling is convenience sampling as it is convenient to take samples of students at statistics course.

Question 23 This is an example of type I error where we know null hypothesis is correct but we proved alternative hypothesis true,

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