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Answered) Do the levels of fear in children change over time? If so, in what ways?


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 situations. 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 interested 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 freedom

VariableCoefficients.e. of coefficientt-ratioP-valueConstant0.877917

0.1184

7.42

¡à 0.0001

89 means0.397911

0.0676

5.89

¡à 0.0001

Approximately what is a 95% confidence interval for the slope of the least squares regression line?


Answers

(.26, .54)

(.76, 1)

(.74, 1.02)

(.33, .47)

(.38, .42)

 


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