Last year,10 percent of all teenagers in Greenville purchased a new iPhone.This year,a sample of 260 randomly chosen Greenville teenagers showed that 39 had purchased a new iPhone.The test statistic to find out whether the percentage has risen would be

Question

Quizplus · Accepted Answer

The test statistic is calculated using the formula for a proportion: (p̂ - p0) / √(p0(1-p0)/n), where p̂ is the sample proportion (39/260), p0 is the population proportion (0.10), and n is the sample size (260). This calculation results in approximately 2.687.

Last Year,10 Percent of All Teenagers in Greenville Purchased a New