A city has 18,000 apartments. A housing analyst takes 900 random samples of 30 apartments and records x-bar, the mean rent in dollars, for each sample. The 900 x-bar values are graphed. What distribution is this?

A school has 1,200 students. A counselor takes 600 random samples of 40 students and records p-hat, the proportion in a club, for each sample. What does one dot on the plot of the 600 p-hat values represent?

A clinic has records for 7,500 patients. A researcher wants the sampling distribution of the sample median wait time in minutes for samples of 25 patients, using 1,000 samples. What procedure would build it?

Two random samples of 50 cans are taken from the same factory's population of 40,000 cans. One sample has mean mass 331 g and the other has mean mass 329 g. What does this difference show?

A lake contains 12,000 tagged fish. A biologist takes 800 random samples of 35 fish and records p-hat, the proportion with a parasite, for each sample. The 800 p-hat values form what distribution?

A transit agency has 95,000 weekday riders. It takes 700 random samples of 60 riders, records x-bar, the mean trip length in kilometers, for each sample, and makes a dot plot of the 700 values. What does one point on that dot plot stand for?

A district has 3,400 teachers. An analyst wants the sampling distribution of x-bar, the mean years of experience, for samples of 20 teachers, using 500 samples. What should the analyst do?

A farm has 6,000 tomato plants. A botanist takes 1,200 random samples of 15 plants and records x-bar, the mean height in centimeters, for each sample. What has the botanist graphed if all 1,200 means are displayed?

A university has 22,000 undergraduates. A survey team takes 900 random samples of 80 students and records p-hat, the proportion who use campus buses, for each sample. What is one value in that sampling distribution?

A library system has 48,000 checked-out books. Staff want the sampling distribution of the sample maximum checkout length in days for samples of 40 books, using 650 samples. What procedure produces it?

A park has 2,800 trees. Two random samples of 70 trees give p-hat = 0.41 and p-hat = 0.36 for the proportion with insect damage. What does this difference show?

A hospital has 14,500 nurses. An administrator takes 750 random samples of 45 nurses and records x-bar, the mean weekly overtime hours, for each sample. The 750 x-bar values are a graph of what?

A bakery chain has 30,000 muffins made today. A quality team takes 1,000 random samples of 25 muffins, records x-bar, the mean mass in grams, for each sample, and graphs the 1,000 values as a dot plot. What does a single dot on that graph represent?

A state has 5,200 bridges. Engineers want the sampling distribution of p-hat, the proportion needing repair, for samples of 50 bridges, using 850 samples. What procedure matches that goal?

A warehouse has 16,000 packages. A supervisor takes 600 random samples of 30 packages and records x-bar, the mean delivery time in hours, for each sample. If the 600 x-bar values are graphed, what does the graph describe?

A high school has 1,850 students. Two random samples of 90 students give p-hat = 0.62 and p-hat = 0.57 for owning a bicycle. How should these two results be understood?

A museum has 9,000 annual members. Staff take 700 random samples of 35 members, record x-bar, the mean age in years, for each sample, and graph the 700 values. What is one plotted value in that graph?

A phone company has 120,000 customers. Analysts want the sampling distribution of the sample range of monthly data use in gigabytes for samples of 25 customers, using 900 samples. What should they graph?

A region has 4,600 household water meters. Inspectors take 500 random samples of 40 meters and record p-hat, the proportion with leaks, for each sample. What distribution do the 500 p-hat values form?

A grocery chain has 10,000 receipts from Monday. Two random samples of 50 receipts have mean totals $28 and $31. What does the difference between the two sample means show?