Warm Up for U1Q1

Match each symbol to the correct definition

• Population parameter

• Sample Standard Deviation

• Population Standard Deviation

• Population Mean

• Sample Statistic Mean

A teacher asks her students to write down all they eat in a day and calculate the total number of calories consumed. This is a/an​ (a)  

• survey
• experiment
• observational study

A researcher randomly divides 50 bean plants into two groups. He puts one group by a window to receive natural light and the second group under artificial light. He records the growth of the plants weekly. Which data collection method is described in this situation?​ (a)  

• experiment
• observational study
• survey

A researcher randomly divides 50 bean plants into two groups. He puts one group by a window to receive natural light and the second group under artificial light. He records the growth of the plants weekly. This is an example of (a)   data.

• primary
• secondary

A researcher wants to know whether background noise affects people’s abilities to complete simple cognitive tasks. She has the 20 people perform a series of tasks. Ten randomly selected subjects perform the tasks in a quiet room. The other 10 perform the tasks in a room traffic noise outside and muffled voices coming from the room next door. She records how successful each group of subjects is in completing the assigned tasks. Identify if the situation is an observational study or experiment. If it is an experiment, identify the treatment.

• observational study

• experiment, the treatment is the background noise

• experiment, the treatment is the cognitive task

• experiment, the treatment is the 20 people

A research study aimed to explore the relationship between screen time and academic performance in students. Data collected included each student's age, study habits, extracurricular activities, screen time, and grades.

Which statement BEST explains the implications of confounding variables?

• Age and extracurricular activities are possible confounding variables, and their implications impact screen time more than academic performance.

• Age and extracurricular activities are possible confounding variables, and their implications could impact academic performance more than screen time.

• Study habits are a possible confounding variable, and their implications impact screen time more than academic performance.

• Study habits are a possible confounding variable, and their implications could impact academic performance more than screen time.

A study was conducted to determine the proportion of college students who prefer online classes. Researchers surveyed 300 college students from several universities and found that 70% preferred online classes.

Instructions: Match each term to the correct description based on the scenario.

• 70%

• Parameter

• The group of 300 college students.

• Population

• All college students at universities.

• Sample

• % of all students who prefer online

• Statistic

Read the scenario carefully. Identify whether the described data represents a population distribution, a sample distribution, or a sampling distribution.

Consider the following three lists of exam scores:

Scores of all students who took the exam. ​

Scores of 50 randomly selected students from all students who took the exam. ​ ​ ​

The mean score of 10 randomly chosen groups of 50 students all students who took the exam. ​

• Sample Distribution

• Scores of all students who took the exam. ​

• Population Distribution

• Scores of 50 randomly selected students from all students who took the exam. ​

• Sampling Distribution

• The mean score of 10 randomly chosen groups of 50 students all students who took the exam.

A company is preparing to manufacture hats in four sizes: small, medium, large, and extra-large. In a survey of 250 customers, 70 said they would buy a large-size hat. If the company plans to make 8,000 hats, how many should be large?

• 3000
• 2240
• 28571

• 2

Tags

CCSS.6.RP.A.3B