The following table shows the annual returns (in percent)for the Fidelity Utilities fund from 2006 through 2010. 
A)Calculate the point estimate of σ.
B)Construct a 95% confidence interval of σ.
Definitions:
Achievement Motivation
The desire to accomplish and excel in tasks through persistence and effort, often driven by an individual's goals and aspirations.
Objective, Multiple Choice
A type of question or assessment method that provides several potential answers, among which only one is correct, emphasizing impartial judgment.
True/False
A method of statement presentation that asks the responder to classify the statement as either true or false.
Learned Needs Model
A theory that suggests needs can be acquired through life experiences and that these needs drive our behavior towards certain goals.
Q3: Exhibit 8-5.A sample of 2,007 American adults
Q4: Exhibit 12.7 The heights (in cm)for a
Q10: A marketing firm wants to estimate how
Q21: The cumulative distribution function F(x)of a continuous
Q39: A Type I error is committed when
Q42: Exhibit 12.5 In the following table,individuals are
Q55: The correlation coefficient could be considered as
Q91: Exhibit 9-4.A school teacher is worried that
Q100: Exhibit 15-1.An marketing analyst wants to examine
Q106: Suppose 35% of homes in a Miami,Florida,neighborhood