Do the levels of fear in children change over time? If so, in what ways? Very li
ID: 3435870 • Letter: D
Question
Do the levels of fear in children change over time? If so, in what ways? Very little research has been done on the prevalence and persistence of fears in children. Researchers surveyed a group of third-and-fourth grade children and asked them to rate their level of fear about a variety of stituations. After two years the children again completed the same survey. The researchers calculated the mean fear rating for each child in both years and were insterested in the relation between these ratings. The least-squares regression line for the data, with 89 mean fear ratings as the explanatory variable and 91 mean fear ratings as the response variable, is given below.
Dependent variable is 91 means.
R squared = 27.4%
S= 0.2374 with 94 ? 2= 92 degrees of feedome
Using the above data, approximately what is the intercept of the least squares regression line?
A) 0.40
B) 0.44
C) 0.88
D) 0.12
E) 0.07
Please show all work
Variable Coefficient s.e. of Coefficient t-ratio p-value Constant 0.877917 0.1184 7.42 0.0001 89 means 0.397911 0.0676 5.89 0.0001Explanation / Answer
Intercept of the Least Square Regression line is the value of the coeffiecient of the constant term
= 0.877917
= 0.88
Answer: C. 0.88
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