handout_week 14

In the context of a Factorial Design, what is an interaction? What is an example of an interaction?

A mail-order catalog firm would like to test the effect of the size of a magazine advertisement and the advertisement design on the number of catalog requests received (data in thousands). Three advertising designs and two different size advertisements were considered. The data obtained follow.   At the 0.05 level of significance, a. Is there an interaction between type of design and size of advertisement? b. Is there an effect due to type of design? c. Is there an effect due to size of advertisement?

A study examined the interactions in a children's museum. (Interactions by visitors to the museum included show-and-tell, learning, teaching, refocusing, participatory play, advocating, and disciplining interactions.) Researchers observed a sample of 180 meaningful interactions, of which 86 were led by children and 94 were led by adult caregivers. Complete parts a through d below. a. Give a point estimate of the true proportion of all meaningful interactions in a children's museum that are led by children. The point estimate is. (Type an integer or decimal rounded to three decimal places as needed.)

A correlational study is designed to A) test causal inferences B) assess the assocation between two measures C)compare the means of three or more groups D) manipulate the independent variables

]14. Many animals, including humans, tend to avoid direct eye contact and even patterns that look like eyes. Some insects, including moths, have evolved eye-spot patterns on their wings to help ward off predators. Scaife (1976) reports a study examining how eye-spot patterns affect the behaviour of birds. In the study, the birds were tested in a box with two chambers and were free to move from one chamber to another. In one chamber, two large eye-spots were painted on one wall. The other chamber had plain walls. The researcher recorded the amount of time each bird spent in the plain chamber during a 60-minute session. Suppose the study produced a mean of M 34.5 minutes on the plain chamber with SS = 210 for a sample of n = 15 birds. (Now: If the eye spots have no effect. then the birds should spend an average of u = 30 minutes in each chamber.) a. Is this sample sufficient to conclude that the eyes pots have a significant influence on the bird's behaviour? Ike a two-tailed test with…

Why are interaction effects only associated with factorial designs? Examine the following data table and indicate the presence of (a) main effect of A, (b) main effect of B, (c) and interaction effect. Verify this with a graph. Factor B B1 B2 Factor A A1 10 5 A2 5 10

I need help with 1, 2 and 3 plz.

A market researcher is trying to determine how age, gender, and race/ethnicity are related to whether or not people own a device for streaming content to a television. In this study, ownership of a streaming device is the:   Group of answer choices   a). dependent variable b). causal variable c). independent variable d). control variable

I need help with 4 and 7

A two-factor research study is used to evaluate the effectiveness of a new blood-pressure medication.  In this two-factor study, factor A is medication versus no medication and factor B is male versus female. The medicine is expected to reduce blood pressure for both males and females, but it is expected to have a much greater effect for males. What pattern of results should be obtained if the medication works as predicted? A)There is no interaction B)There is an interaction C)More information is needed to determine about the interaction

The correlation coefficient, R, measures a) whether or not a scatterplot shows an interesting pattern. b) whether or not a cause-and-effect relation exists between two variables. c) the strength and direction of the linear relation between two variables.

Many animals, including humans, tend to avoid direct eye contact and even pattern that look like eyes. Some insects, including months, have involved eye-spot pattern in their wings to help ward off predators. Scalfe (1976)reports a study examining how eyes spot patterns effect the behavior of birds. In the study birds were tested in a box with two chambers and were free to move from one chamber to another. In one chamber, two large eyes spot were painted on one wall. The other chamber to another. The researcher recorded the amount of time each bird spend in the plain chamber during a 60-minutes session. Suppose the study produced a mean of M=34.5 minutes in the plain chamber with SS=210  for a sample of n=15 birds ( Note if the eyes spots have no effect, then the birds should spend and average of µ=30 minutes in each chamber.) A) Is this sample sufficient to conclude that the eyes -spot have significant influence on the birds behaviors? Use a two- Tailed test with α=.05 Compute the…

In an the researcher interacts and influences the behavior of the subjects. In an Observational Study; Observational Study Designed Experiment; Designed Experiment Designed Experiment; Observational Study Observational Study; Designed Experiment the researcher observes the subjects and makes no effort to interact or influence the subjects.

The correlation coefficient between factor score and the variables included in the study is known as: a. Component Matrix b. Rotated Component Matrix c. Communalities

Many animals, including humans, tend to avoid direct eye contact and even patterns that look like eyes. Some insects, including moths, have evolved eye-spot patterns on their wings to help ward off predators. Scalfe (1976) reports a study examining how eye-spot patterns affect the behavior of birds. In the study, the birds were tested in a box with two chambers and were free to move from one chamber to another. In one chamber, two large eye-spots were painted on one wall. The other chamber had plain walls. The researcher recorded the amount of time each bird spent in the plain chamber during a 60-minute session. Suppose the study produced a mean of M = 34.5 minutes in the plain chamber with SS = 210 for a sample of n = 15 birds. (Note: If the eye spots have no effect, then the birds should spend an average of µ = 30 minutes in each chamber. Construct the 90% confidence interval to estimate the mean amount of time spent on the plain side for the population of birds.

A study that tells us whether two variables are associated, but does not tell us if one variable causes or influences the other, is: Question 2 options:   A)  a n experimental study without a control group.   B)  a descriptive study.   C)  a correlational study.   D)  an experimental study with one or more control groups.

Factorial designs allow us to study both (blank) effects of the independent variables on the dependent variables. A. Main and interactive B. Symbiotic and dichotomous C. Dependent and independent D. Rank order and correlational