Methods of Data Collection

Which term goes to the following Definitions:

1) ​​ (a)   : Data is collected from every member of a population.

2) ​ (b)   : Data is collected from a sample group within a population

• Census
• Parameter

• Sample Survey

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

For each of the following statements, select true, false, or not enough information.

1. 1. One benefit of a sample survey is that the data will always represent the entire population. ​ (a)  

2. 2. A census is unrealistic in most situations. ​ (b)  

3. 3. When completing a sample survey, it is important to randomly select the sample group to ensure only desired characteristics of population are included. ​ (c)  

• False
• True
• Not Enough Info

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

A big box retailer is doing some product evaluations to determine if it should discontinue production of its generic hand cream. The research and development department surveys 1,000 randomly selected customers from the last month and asks if they prefer the brand name or the generic. They calculate that only 32% of those surveyed prefer the generic hand cream.

Which of the following statements is true?

• The Retailer conducted a census

• The calculation of 32% is the parameter

• The calculation 32% is a statistic

• 1. The retailer conducted a sample survey without randomization.

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

A graduate student is writing a grant in hopes of obtaining money to further her research. She takes a random sample of three-year-old preschool students in her county and finds that 22% of them experience a speech delay with a margin of error of ±5.

After receiving the grant money, she surveys every three-year-old preschool student in her county and finds that 19% of them experience a speech delay with a margin of error of ±2.

Match each calculation to the term that best describes it.

• Parameter

  (Percent)

• ±2

• Parameter

  (Number)

• 22%

• Statistic

  (Percent)

• ±5

• Statistic

  (Number)

• 19%

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

Kaylee has been struggling with her Spanish tests. Her friends want to help her score higher, so they set out to find the best study method. They randomly separate themselves into two groups. One group studies with flash cards and the other group studies by writing vocabulary words over and over. After the next test they compare their test scores and discover the group that studied with flash cards had higher test scores.

Which is a conclusion that could be drawn from the experiment?

• 1. There is a correlation between methods of studying and test scores.

• 1. Studying with flash cards caused higher test scores.

• 1. Studying by writing vocabulary words caused higher test scores.

• 1. There is not enough information to make a conclusion.

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

Which of the following is incorrect about observational studies?

• 1. Experimenter has no control of variables.

• 1. Correlation can be established between the variables.

• 1. No randomization is needed.

• 1. Variables of interest are measured.

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

A research group is testing the effectiveness of a new headache medication. They select 100 patients from across the country with migraines and randomly split them into two groups. The first group is instructed to take their current medication at the onset of a migraine and record how long it takes for the headache to disappear. The second group is instructed to take the new medication at the onset of a migraine and record how long it takes for the headaches to disappear. The two groups reported very similar times in headache relief.

The researcher concludes that there is no correlation in medication taken and time until headache relief. What is incorrect about this conclusion?

• This is the correct conclusion.

• The researcher should have concluded that there is a correlation between medication taken and time until headache relief.

• The researcher should have concluded that the type of

  medication taken did not cause a change in time until headache relief.

• The researcher should have concluded that the type of

  medication taken did cause a change in time until headache relief.

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

Is study 1 an experiment or observational study?

• Experiment

• Observational Study

• Not Enough Information

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

Is study 2 an experiment or observational study?

• Experiment

• Observational Study

• Not Enough Information

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C

Is study 3 an experiment or observational study?

• Experiment

• Observational Study

• Not Enough Information

Tags

HSS.IC.B.3

TEKS

111.47.c.2.B

111.47.c.2.C