Researchers found that the number of minutes children could wait before eating a

Question

Researchers found that the number of minutes children could wait before eating a marshmallow if they were promised more marshmallows for waiting (delayed gratification) predicted their high-school GPA very accurately. The total variance explained by ability to delay gratification in high-school GPA is 60% (because adjusted R-Square= .60).

The regression tables look like this:

Model Summaryb

Model

R

Adjusted R Square

Std. Error of the Estimate

1

.837a

.600

.22532

Coefficientsa

Model

Unstandardized Coefficients

Standardized Coefficients

t

Sig.

B

Std. Error

Beta

1

(Constant)

2.100

.276

7.610

.005

X

.262

.099

.837

2.647

.077

a. Dependent Variable: Y

Choose the option that best describes these results:

Question 9 options:

The model predicts that a child who was completely unable to wait to eat the marshmallow (i.e., waited 0 minutes) should have a high-school GPA of 2.10.

The model predicts that a child who has a high-school GPA of 0 would wait 2.10 minutes before eating the marshmallow.

The model predicts that a child who has a high-school GPA of 0 would wait .276 minutes before eating the marshmallow.

The model predicts that a child who was completely unable to wait to eat the marshmallow (i.e., waited 0 minutes) should have a high-school GPA of 2.76.

Model Summaryb

Model

R

Adjusted R Square

Std. Error of the Estimate

1

.837a

.600

.22532

Explanation / Answer

Option A is Correct. The model predicts that a child who was completely unable to wait to eat the marshmallow (i.e., waited 0 minutes) should have a high-school GPA of 2.10

Because if the waiting time is zero, then High School GPA will be 2.10

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