4. A random sample of 64 bicycle-riding adults in Portland indicated that 24 always wore a helmet while riding. A random sample of 80 bicycle-riding adults in Amsterdam indicated that 18 always rode a helmet while riding. (A) Use the sample information to develop a 95% confidence interval estimate for the difference between the proportions of bicycle-riding adults that wear a helmet in the two cities. (B) Based on the sample results, can you conclude that the population proportion of bicycle-riding adults in Portland who always wear a helmet is greater that the population proportion of bicycle- riding adults in Amsterdam who always wear a helmet? Use a 0.025 level of significance to conduct the test.
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
Answer for section A
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