A study investigates whether there is a significant difference in mean exam scores between students who receive tutoring and those who do not. Which type of t-test would be most suitable?*One-sample t-testDependent samples t-testIndependent samples t-testPaired samples t-testNone of the above

A study was carried out to investigate exam performance for university students. One version of the study involved students at the University of Taranaki, who volunteered to be in the study. Two groups were compared: a group that were trained in a new study technique and a group that were asked to use their current study technique. These groups were determined by giving participants the option to choose which group they were in. The researchers conducted a two sample t-test and found a difference of 6.5 between the mean exam scores for each group (p-value = 0.062), with the group that were trained in a new study technique having the higher mean. What kind of study was this (experiment or observational)

teacher is experimenting with a new computer-based instruction and conducts a study to test its effectiveness. In which situation could the teacher use the two-sample t-test for comparing two population means? The teacher gives each student in the class a pretest. Then she teaches a lesson using a computer program. Afterwards, she gives each student a post-test. The teacher wants to compare test scores for each student to see whether the data will show an improvement. The teacher randomly divides the class into two groups. One of the groups receives computer-based instruction and the other group receives traditional instruction without computers. After instruction, each student takes a test and the teacher wants to compare the test scores of the two groups. The teacher uses a combination of traditional methods and computer-based instruction. She asks students which they liked better. She wants to determine if the majority prefer the computer-based instruction.

Which of the following statistical analysis is also known as Student’s T statistics?*1 pointF - TestChi – Square TestT - TestZ - Test

Which of these examples of samples is appropriate for a paired t-test?Question 7Answera.The pupils in a boys’ school, and in a girls’ school in the same townb.Pairs of same-gender twinsc.Sets of two people solving word puzzles together over the internetd.Surveys given to a group of fathers and their oldest child

.Question 14Researchers were interested in differences in cooperation during and after a stressor. They tested a group 1 day after their final exams ended. What hypothesis test should be used to compare the mean difference in cooperation scores?1 pointOne-sample t-test Paired-samples t-testOne-sample z-testIndependent-samples t-test