A Sample of 32 Orders for a Home Shopping Channel $\$ 78.25 \pm \$ 37.50$

question 17

Multiple Choice

A sample of 32 orders for a home shopping channel has an average of $78.25.The standard deviation for all orders (the population) is $37.50.A 90% confidence interval around this sample mean would be:

• A)\(\$ 78.25 \pm \$ 37.50\)
• B)\(\$ 78.25 \pm \$ 10.87\)
• C)\(\$ 78.25 \pm \$ 6.63\)
• D)\(\$ 37.50 \pm \$ 6.63\)
• E) \(\$ 37.50 \pm \$ 1.64\)

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Definitions:

Silicates

Minerals that contain silicon and oxygen, often with one or more metals, forming the majority of the Earth's crust.

Element Si

Silicon, a chemical element with symbol Si, known for its semiconductor properties and abundant use in electronic devices.

Quartz

A hard, crystalline mineral composed of silicon dioxide, notable for its durability and its use in making jewelry and electronic equipment.

Oxides

Compounds composed of oxygen and another element, which can form minerals and play significant roles in geological processes.