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Student archaeologists An archaeological dig turns up large numbers of pottery shards,

broken stone tools, and other artifacts. Students working on the project classify each

artifact and assign a number to it. The counts in different categories are important for

understanding the site, so the project director chooses 2%of the artifacts at random and

checks the students’ work. Identify the population and the sample.

Short Answer

Expert verified

Population: Pottery shards discovered during the dig.

Sample:Two percent of ceramic shards

Step by step solution

01

Given information

We have to find the population and the sample

02

Explanation

A sample survey picks a group of people from a larger group of people about whom we wish to learn more.

Pottery shards discovered during the dig.

Two percent of ceramic shards are verified as a sample.

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Most popular questions from this chapter

Seed weight (2.2) Biological measurements of the same species often follow a normal distribution quite closely. The mean weights of seeds of a variety of winged beans are approximately normal, with a mean of 525milligrams (mg) and a standard deviation of 110mg.

a. What percent of seeds weigh more than 500mg?

b. If we discard the lightest 10%of these seeds, what is the smallest weight among the remaining seeds?

Do you trust the Internet? You want to ask a sample of high school students the question “How much do you trust information about health that you find on the Internet—a great deal, somewhat, not much, or not at all?” You try out this and other questions on a pilot group of 5students chosen from your class.

a. Explain how you would use a line of Table D to choose an SRS of 5students from the following list.

b. Use line 107to select the sample. Show how you use each of the digits.

A simple random sample of 1200 adult Americans is selected, and each person is asked

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answered “Yes.” This survey

a. is reasonably accurate because it used a large simple random sample.

b. needs to be larger because only about 24 people were drawn from each state.

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d. is very inaccurate but neither understates nor overstates the percent of people who favor

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e. probably overstates the percent of people who favor sending humans to Mars.

Weight? Wait what? Marcos asked a random sample of 50mall shoppers for their weight. Twenty-five of the shoppers were asked directly and the other 25 were asked anonymously by means of a “secret ballot.” The mean reported weight was13 pounds heavier for the anonymous group. Explain why the two means are so different.

Sampling gravestones The local genealogical society in Coles County, Illinois, has compiled records on all 55,194gravestones in cemeteries in the county for the years 1825to 1985. Historians plan to use these records to learn about African Americans in Coles County’s history. They first choose an SRS of 395records to check their accuracy by visiting the actual gravestones.

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