Use the Following to Answer the Question(s) Below

question 52

Multiple Choice

Use the following to answer the question(s) below.
IT staff for a large corporation has developed the following probability distribution for the number of calls requiring troubleshooting problems per day.

-After computing a confidence interval, the investigator believes that the results are meaningless because the width of the interval is too large. In reconstructing the interval, the investigator should

• A) decrease the sample size.
• B) increase the level of confidence.
• C) increase the sample size.
• D) reduce the population variance.
• E) increase the margin of error.

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Definitions:

High-Low Method

A technique used to estimate variable and fixed components of a cost by analyzing the highest and lowest activity levels.

Least-Squares Regression

A statistical method used to determine the line of best fit by minimizing the sum of the squares of the differences between observed values and those predicted by the line.

Scattergraph

A graphical representation that plots individual data points, often used to identify trends or correlations in data analysis.

Least Square Regression

A statistical method used to determine the line of best fit by minimizing the squared differences between observed values and the values predicted by the line.