The Following Table Shows the Annual Returns (In Percent)for the Fidelity

question 21

Essay

The following table shows the annual returns (in percent)for the Fidelity Utilities fund from 2006 through 2010. a.Calculate the point estimate of σ².
b.Construct a 95% confidence interval of σ².

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Definitions:

Triceps Brachii

A large muscle on the back of the upper arm responsible for extending the elbow and is composed of three heads.

Tensor Fascia Latae

A muscle of the thigh that helps to stabilize and move the hip and knee, and is involved in the iliotibial band.

Iliopsoas

A major hip flexor muscle group that is composed of the iliacus and psoas major muscles, playing a key role in lifting the thigh and stabilizing the pelvis.

Vastus Medialis

A muscle located in the thigh that extends the leg at the knee and is part of the quadriceps group.