1) To determine whether speed reading influences reading comprehension, a resear
ID: 3332709 • Letter: 1
Question
1) To determine whether speed reading influences reading comprehension, a researcher obtains two reading comprehension scores for each student in a group of high school students, once before and once after training in speed reading. Test 2) Another investigator criticizes the design of the previous study, saying that high school students should have been randomly assigned to either the special training condition or a control condition and tested just once at the end of the study. Subsequently, she conducts the study. Test 3) A psychologist studied the effects of likeability and nervousness on subjects' willingness to convict a defendant in a mock trial. Subjects were shown a tape of either a likeable or not likeable defendant, who was either nervous or calm on the stand. They then rated how likely they would be to convict the defendant on a 1-10 scale where higher numbers indicate more likely to convict. There were 10 subjects in each condition TestExplanation / Answer
Solution:-
1) Matched-pairs t-test
We have to use the matched-pairs t-test to determine whether the difference between sample means for paired data is significantly different from the hypothesized difference between population means.
We are using matched pair t-test because subjects are same. The two sample are dependent.
2) Two-sample t-test
Use the two-sample t-test to determine whether the difference between means found in the sample is significantly different from the hypothesized difference between means.
The two sample are indeopendent.
3) Chi square test for independence.
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