A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question.Ten years ago, according to government records, 17% of the population of Elmwood had no health insurance. This year a poll revealed that 19.9% were without insurance. The margin of error was 2.8 percentage points. Find a confidence interval for the true percentage without insurance this year. Can we conclude that the percentage without insurance has increased from ten years ago?

Use the range rule of thumb to approximate the standard deviation.The race speeds for the top eight cars in a 200-mile race are listed below. Round results to the nearest tenth.183.2, 175.8, 189.2, 183.4, 175.6, 178.3, 186.1, 177.9

Solve the problem.The regular selling price of an item is $150. For a special year-end sale the price is at a markdown of 20%. Find the discount sale price.

Use the graph to answer the question.What was the revenue for the third quarter of 1999?

Find the range for the given data.The manager of an electrical supply store measured the diameters of the rolls of wire in the inventory. The diameters of the rolls (in m) are listed below.0.491, 0.666, 0.229, 0.409, 0.323, 0.114

Solve the problem.In a local election, 42,000 people voted. This was an increase of 13% over the last election. How many people voted in the last election?

Answer the question.In the 1980s, the population of Pleasanton decreased by 10%. In the 1990s, its population increased by 20%. How does the population of Pleasanton at the end of the 1990s compare with its population in 1980?

A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question.Ten years ago, according to government records, 17% of the population of Elmwood had no health insurance. This year a poll revealed that 20.7% were without insurance. The margin of error was 3.6 percentage points. Find a confidence interval for the true percentage without insurance this year. Can we conclude that the percentage without insurance has increased from ten years ago?

Two measurements are given. Find the absolute difference and then find the relative difference. Assume that the first quantity is the compared value and the second quantity is the reference value. If necessary, round your answers to one decimal place.Last year the total revenue for Clearline phone company was $16.4 million while the revenue for its competitor, the Speakmore was $7.5 million.

A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question.In a survey conducted in a certain city it was found that 3.3% of men and 4% of women were unemployed. The margin of error for each report was 0.4 percentage points. Use each sample statistic to find a confidence interval. Can we conclude that the unemployment rate is higher amongst women than amongst men?