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# Planning an experiment

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Question1
Mary is planning a study to see if learning of 6th graders on a math lesson is affected by background noise level. She wants to use a t-test for independent groups to analyze her results. Help her plan her study. What is her independent variable (IV) here? Describe two conditions she could create for the IV in her study. What is her dependent variable (DV) here? Describe a way to measure the DV so that each participant would have one score at the end. Would this DV measure be on a continuous scale of measurement? Why is this important? Explain and justify. [Reference Needed]

Question 2
Consider Mary's experiment regarding whether learning of 6th graders on a math lesson is affected by background noise level. Mary has collected her data. What is the null hypothesis for her study? What is the alternative hypothesis for her study? What are the assumptions that must be met about her data before she can correctly use an independent t-test to test the hypotheses? Why? How would she see if her data meet these assumptions? How much room does she have to violate any of these assumptions and still get accurate results from the t-test? Explain and support your answers.[Reference Needed]

https://brainmass.com/statistics/designing-studies/planning-an-experiment-553129

#### Solution Preview

Question-1:
Mary is planning a study to see if learning of 6th graders on a math lesson is affected by background noise level. She wants to use a t-test for independent groups to analyze her results. Help her plan her study. What is her independent variable (IV) here? Describe two conditions she could create for the IV in her study. What is her dependent variable (DV) here? Describe a way to measure the DV so that each participant would have one score at the end. Would this DV measure be on a continuous scale of measurement? Why is this important? Explain and justify.
Solution-1:
The independent variable (IV) is 'background noise level'.
As Mary is planning to use t-test for independent groups, she must create two independent groups of background noise level. For this, she must first create two separate environments comprising of two distinct background noise levels. One environment must have zero or almost nil background noise level and the other environment must have high or substantial background noise level.
The dependent variable (DV) is the 'level of learning 6th graders on a math lesson'.
Mary should subject some of the 6th graders to the first ...

#### Solution Summary

The expert plans an experiment. Two conditions to create IV studies are provided.

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## Science education

The 12 science processes used in science experiments are divided into two groups:

(1) The basic processes include:

(a) observing

(b) classifying

(c) communicating

(d) measuring

(e) predicting

(f) inferring

(2) The integrated processes include:

(a) identifying and controlling variables

(b) formulating and testing hypotheses

(c) interpreting data

(d) defining operationally

(e) experimenting

(f) constructing models

ii) Create a chart listing each process, the definition of each process, and one example of a science activity for each, in which a teacher can engage the students.

How do these processes support inquiry learning? What role does the teacher's attitude factor in the students' view of science?

iii) One or more of the twelve science processes are embedded in science experiments/lessons. Select a completed science lesson plan available online that includes students interacting through group work or individual experiments.

(1) suggested Web sites, identify any of the 12 science processes you recognize within that written lesson. You will bold the recognized process within the lesson plan, and label the corresponding process. All 12 processes may not be evident in one lesson plan.

(2) Include the lesson plan that you have used for this assignment.

response is 1,538 words, includes a lesson for 10th grade "build an animal"

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