Questions from Business Statistics

Q: The U.S. Bureau of Labor Statistics reports that 10

The U.S. Bureau of Labor Statistics reports that 10.2% of U.S. workers belonged to unions in 2018. Suppose a sample of 400 U.S. workers is collected in 2019 to determine whether union efforts to organ...

Q: A population has a mean of 400 and a standard deviation of

A population has a mean of 400 and a standard deviation of 100. A sample of size 100,000 will be taken, and the sample mean x will be used to estimate the population mean. a. What is the expected valu...

Q: What percentage of the population live in their state of birth?

What percentage of the population live in their state of birth? According to the U.S. Census Bureau’s American Community Survey, the figure ranges from 25% in Nevada to 78.7% in Loui...

Q: Jon Weidman, first shift foreman for Cut-Rate Machining,

Jon Weidman, first shift foreman for Cut-Rate Machining, Inc., is attempting to decide on a vendor from whom to purchase a drilling machine. He narrows his alternatives to four vendors: The Hole-Maker...

Q: A study conducted by the Pew Research Center showed that 75%

A study conducted by the Pew Research Center showed that 75% of 18- to 34-year-olds living with their parents say they contribute to household expenses (The Wall Street Journal). Suppose that a random...

Q: The following data show the percentage of 17- to 24-

The following data show the percentage of 17- to 24-year-olds who are attending college in several metropolitan statistical areas in four geographic regions of the United States (U.S. Census Bureau we...

Q: 4K televisions (TVs) contain approximately four times as many pixels

4K televisions (TVs) contain approximately four times as many pixels to display images as a 1080-display TV, and so they offer much higher picture resolution. Suppose that the following survey results...

Q: A Gallup Poll showed that 30% of Americans are satisfied with

A Gallup Poll showed that 30% of Americans are satisfied with the way things are going in the United States (Gallup website). Suppose a sample of 20 Americans is selected as part of a study of the sta...

Q: The SAT is a standardized test used by many colleges and universities

The SAT is a standardized test used by many colleges and universities in admission decisions. More than 1.8 million high school students take the SAT each year. The 2019 version of the SAT is composed...

Q: The file Median Household contains the median household income for a family

The file Median Household contains the median household income for a family with two earners for each of the fifty states (American Community Survey, 2013). a. Construct a frequency and a percent fre...