Find the Confidence Interval Specified

question 20

Multiple Choice

Find the confidence interval specified. Assume that the population is normally distributed.
-Thirty randomly selected students took the calculus final. If the sample mean was 93 and the standard deviation was 13.3, construct a 99% confidence interval for the mean score of all students.

• A)88.87 to 97.13
• B)86.31 to 99.69
• C)87.02 to 98.98
• D)86.33 to 99.67

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Definitions:

Producer Surplus

The difference between the actual price a producer receives for a product and the minimum price they would accept.

Sugar

A sweet-flavored substance derived primarily from sugarcane and sugar beet, used extensively as a sweetener in food and beverages.

Import Tariffs

Taxes imposed by a government on goods brought into its jurisdiction from foreign countries, typically used to protect domestic industries.

Consumer Surplus

The distinction between what consumers are willing and financially capable of paying for a product or service, and the actual expenditure.