For each of the following studies, answer the questions: (a) what is the IV? (b)
ID: 3219858 • Letter: F
Question
For each of the following studies, answer the questions: (a) what is the IV? (b) what is the DV? (c) what are the scales of measure for each variable? (d) what are the null and alternative hypotheses (you can assume each is a two-tailed test) a) An educational researcher randomly assigns fourth-grade students to receive a new after-school math program or to receive the standard after-school math program; she then measures how well they all do on a math test. b) A researcher measures the heights of college students and compares college students who come from a large family to college students who come from smaller families. c) A researcher compares the resting heart rate of individuals who have been assigned to take a particular drug and compares them to individuals who have not been assigned to take the drug. Exercises: A teacher was interested in if using a student's own name in a story affected children's attention span while reading. Six children were randomly assigned to read a story under ordinary conditions (names like Dick and Jane). Six other children read versions of the same story, but with each child's own name substituted for one of the children in the story. The teacher kept a careful measure of how long it took each child to read the story. The reading times in minutes are shown below:Explanation / Answer
(3)
A:
(a) IV, Independent Variable: A binary variable of whether they recieved new after school math program or a standard after school math program.
(b) DV, Dependent Variable: How well they do in the math test
(c) Null and alternate Hypothesis
H0: Whether they recieve the new after school math program or a standard after school math program have no significance difference in how well they do in the math test.
H1: Whether they recieve the new after school math program or a standard after school math program have significance difference in how well they do in the math test.
B:
(a) IV, Independent Variable: A binary variable of whether they come from a small or large family.
(b) DV, Dependent Variable: Height of college students
(c) Null and alternate Hypothesis
H0: Whether they come from a small or large family have no significant effect in the height of students.
H1: Whether they come from a small or large family have significant effect in the height of students.
C:
(a) IV, Independent Variable: A binary variable of whether the induviduals are administered the drug or not.
(b) DV, Dependent Variable: Resting heart rate of individuals
(c) Null and alternate Hypothesis
H0: The drug have have no significant effect in the resting heart rate of individuals.
H1: The drug have have significant effect in the resting heart rate of individuals.
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