Exam 1: Data Collection

The top 38 cities in Wisconsin as determined by population are given below. Select a random sample of fourcities from the list below using the two digit list of random numbers provided. Begin with the uppermost leftrandom number and proceed down each column. When a column is complete, use the numbers at the top ofthe next right column and proceed down that column. Information was obtained from the web sitehttp://www.citypopulation.de/USA-Wisconsin.html. Wisconsin Cities by Population 1 Milwaukee 9 Eau Claire 17 New Berlin 25 West Bend 33 Watertown 2 Madison 10 Janesville 18 Wausau 26 Superior 34 Muskego 3 Green Bay 11 West Allis 19 Greenfield 27 Mourt Pleasant 35 De Pere 4 Kenosha 12 La Crosse 20 Beloit 28 Neenah 36 Fitchburg 5 Racine 13 Sheboygan 21 Manitowoc 29 Stevens Point 37 South Milwaukee 6 Appleton 14 Wauwatosa 22 Menomonee Falls 30 Caledonia 38 Grand Chute 7 Waukesha 15 Fond du Lac 23 Franklin 31 Sun Praine 8 Oshkosh 16 Brookfield 24 Oak Creek 32 Mequon Random Numbers 21 49 6 6 19 15 11 17 12 43 4 31 7 18 1 43 23 30 2 24 21 18 6 48 44 12 20 32 2 28 12 38 8 30 38 43 41 29 3 13

Determine the level of measurement of the variable. -an officerʹs rank in the military

A farmer wishes to test the effects of a new fertilizer on her tomato yield. She has four equal-sized plots ofland-- one with sandy soil, one with rocky soil, one with clay-rich soil, and one with average soil. She divideseach of the four plots into three equal-sized portions and randomly labels them A, B, and C. The four Aportions of land are treated with her old fertilizer. The four B portions are treated with the new fertilizer, andthe four Cʹs are treated with no fertilizer. At harvest time, the tomato yield is recorded for each section of land.What type of experimental design is this?

A drug company wanted to test a new arthritis medication. The researchers found 700 adults aged 25-35 andrandomly assigned them to two groups. The first group received the new drug, while the second received aplacebo. After one month of treatment, the percentage of each group whose arthritis symptoms decreased wasrecorded and compared. What is the response variable in this experiment?

Determine the level of measurement of the variable. -the musical instrument played by a music student

A recent study attempted to estimate the proportion of Florida residents who were willing to spend more taxdollars on protecting the Florida beaches from environmental disasters. Forty-two hundred Florida residentswere surveyed. Which of the following is the population used in the study?

A drug company wanted to test a new arthritis medication. The researchers found 500 adults aged 25-35 andrandomly assigned them to two groups. The first group received the new drug, while the second received aplacebo. After one month of treatment, the percentage of each group whose arthritis symptoms decreased wasrecorded and compared. Identify the experimental units.

Mark retired from competitive athletics last year. In his career as a sprinter he had competed in the 100 -metersevent a total of 328 times. His average time for these 328 races was 10.25 seconds.

Which type of bias occurs because we do not obtain complete information about a population?

Identify the type of sampling used. -The names of 30 employees are written on 30 cards. The cards are placed in a bag, and three names are pickedfrom the bag. What sampling technique was used?

What will help insure that the effect of a treatment is not due to some characteristic of a single experimentalunit?

Identify the type of sampling used. -At a local technical school, five auto repair classes are randomly selected and all of the students from each classare interviewed. What sampling technique is used?

Determine whether the quantitative variable is discrete or continuous. -the number of bottles of juice sold in a cafeteria during lunch