It Is Generally Believed That Nearsightedness Affects About 12% of Children

question 69

Essay

It is generally believed that nearsightedness affects about 12% of children. A school district
gives vision tests to 133 incoming kindergarten children.
a. Describe the sampling distribution model for the sample proportion by naming the
model and telling its mean and standard deviation. Justify your answer.
b. Sketch and clearly label the model.
c. What is the probability that in this group over 15% of the children will be found to be
nearsighted?

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Definitions:

Sales

The activities involved in selling products or services, or the total amount of goods or services sold.

Times-Interest-Earned Ratio

A fiscal indicator that evaluates a firm's capacity to satisfy its debt commitments utilizing its present income.

Operating Costs

Expenditures that are necessary for the day-to-day operations of a business, including costs related to manufacturing, sales, and administration.

Interest Charges

Interest charges are the costs incurred by an entity for borrowing money, quantified as a percentage of the principal loan amount.