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Chapter 10: Q. 61 (page 658)

Preventing drowning Drowning in bathtubs is a major cause of death in children less than 5 years old. A random sample of parents was asked many questions related to bathtub safety. Overall, 85% of the sample said they used baby bathtubs for infants. Estimate the percent of all parents of young children who use baby bathtubs.

Short Answer

Expert verified

One-sample z interval for a proportion.

Step by step solution

01

Concept Information

Except for birth abnormalities, drowning kills more infants between the ages of one and four.

Drowning occurs in a matter of seconds and is frequently silent.

Anyone can drown at any time when there is access to water.

02

Explanation

One proportion: ztest/interval with one sample

There are two proportions: ztest/interval with two samples

Interval ttest/one-sample ttest/one-sample ttest/one-sample ttest/one-

Two methods are used: a two-sample ttest and an interval test.

If you wish to check for a difference, equality, increase, or reduction, use a test. If you want to estimate an interval in which the true value lies, use an interval.

Because we wish to estimate the true value of one proportion, we utilize a one-sample zinterval (percent).

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