.2 TESTS, VARIABLES AND TYPES OF DATA

1.For the study described below, choose the appropriate test among the following four tests:

a) paired-samples t-test b) independent samples t-test c) repeated-measures ANOVA d) one way ANOVA.

Explain the reasons for the choice. In the explanation, please name:

i.both independent variable(s) and dependent variable(s), ii.what type of variables they are (categorical, continuous, or ratio) iii.what the levels of the independent variable(s) are iv.whether it is a between-groups or a repeated measures design

This study investigated whether teaching students the meaning of words increases the amount of words learnt while reading in a second language. Sixty high-school school students of English as a second language read a simplified short story by Roald Dahl. The story contained 16 low-frequency words, which were selected as target words. Students were randomly assigned to one of the two groups: one group read the story with glosses in the margins (Marginal Glosses group), and the other group received no additional information about the meaning of the target words (Control group). After reading the story, students were asked to write the meanings of the 16 target words in their first language. Students received one score for each word correctly defined.

Test selected:

Reasons for choice:

2.Read the description below and answer the questions This study tested whether tertiary-level students from Thailand who have at least one English-speaking parent are more likely to be studying abroad than those with no parent who can speak English.

QUESTIONS	ANSWERS
Independent variable (give it a meaningful name):
Number of levels of the independent variable:
The levels of the independent variable are:
Dependent variable (give it a meaningful name):
Number of levels of the dependent variable:
The levels of the dependent variable are:
The null hypothesis is:

3.Read the following description of the sets of data, then answer which type of data best describes the data in each set

Choose from: Nominal Ordinal Interval

1) Popularity of learner activities: activity type A is the most popular, activity type B is the next, activity type C is the next, and activity type D is the least favourite. Which of the above terms best describes the data? Answer:

2)Strategies that learners use when they don't know a word in a reading comprehension activity (e.g. use a dictionary, ask the teacher, ask a friend, guess) V Which of the above terms best describes the data? Answer: