Suppose that I performed a reliability analysis to determine whether high school students' grades in four different subjects (English, Math, Science, Social Studies) formed a reliable scale with a high Cronbach's alpha. I performed the analysis and got the results presented in the two tables below.

\begin{array}{c}\text { Reliab ility Statistics }\\\begin{array}{|r|r|}\hline \begin{array}{c}\text { Cronbach's } \\\text { Alpha }\end{array} & \text { N of Items } \\\hline .892 & 4 \\\hline\end{array}\end{array}

\begin{array}{|l|c|r|r|r|}\hline & \begin{array}{c}\text { Scale Mean } \\\text { if Item } \\\text { Deleted }\end{array} & \begin{array}{c}\text { Scale } \\\text { Variance if } \\\text { Item Deleted }\end{array} & \begin{array}{c}\text { Corrected } \\\text { Item-Total } \\\text { Correlation }\end{array} & \begin{array}{c}\text { Cronbach's } \\\text { Alpha if Item } \\\text { Deleted }\end{array} \\\hline \text { English grade } & 21.9358 & 111.296 & .769 & .859 \\\text { Math grade } & 23.1301 & 109.392 & .700 & .886 \\\text { Science grade } & 22.1658 & 105.074 & .801 & .847 \\\text { Social studies grade } & 21.5330 & 110.514 & .787 & .853 \\\hline\end{array}

a. What is the reliability of this scale, as indicated by the Cronbach's alpha. Is this a high or low level of reliability?
b. Which item seems to be contributing the least to the overall Cronbach's alpha?
c. Which item, if any, would you recommend removing from this scale?

What Kinds of Variables Are Appropriate to Use in a Factor

Essay

Correct Answer:VerifiedVariables that are measured us...View AnswerUnlock this answer nowGet Access to more Verified Answers free of chargeView Full Answer For Free

Correct Answer:
Verified
Variables that are measured us...
View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge