3.1 Overview
3.2 Hypothesis
3.6 Sampling Methods
3.7 Survey Design
Bonus
100
What are the 5 parts of the research cycle?
Question, Design, Collect, Analyze, Report
100
Khalid is reading his cereal box as he gets ready to eat breakfast. The box states the total weight is 19 ounces. He wants to measure all his 19 ounce cereal boxes to see if the weight is correct. State the null and alternative hypotheses using mathematical symbols.
Ho:
mu=19
HA:
mu<19
100
CNN conducted a political poll to determine who voters were going to support in the presidential election. Pollsters were aware that opinions could be affected by geographical region, so they divided the country into regions: Southeast, Northeast, Midwest, Rocky Mountain, Pacific, ect. They randomly chose 50 people from every region to be in the polling sample. What sampling technique is this?
Stratified Random Sampling
100
Write a closed-style question for the following:
The summer break should be longer.
The summer break should be longer.
Strongly Agree, Agree, No Opinion, Disagree, Strongly Disagree
100
What year was Mr. Nations born?
1997
200
An agricultural scientist is interested in determining which brand of fertilizer makes peanuts produce the highest yield. An experiment is conducted using three different brands of fertilizer (Brand A, Brand B, Brand C). The experiment was designed so one acre of peanuts had fertilizer added to it, and another acre of peanuts did not receive the added fertilizer. What is the treatment?
The three different brands of fertilizer
200
Peter wants to buy a new pair of shoes. While at the shoe store, he remembers that all his shoes at home are a size 12, but he can only find a size 10 in the shoe that he wants to buy. Write a null hypothesis and an alternative hypothesis.
HO: The size 10 shoe fits.
HA: The size 10 shoe is too small.
200
The student council at a local high school wants to conduct a survey concerning the quality of the food in the cafeteria. The student council president posts a council member at every entrance and tells them to pick the first 25 students that come through the door. What sampling technique is this?
Convenience Sampling
200
Write a closed-style question for the following:
Do all my teachers like their job?
On a scale of 1-10 (1 being hate and 10 being love), how much do you like your job?
200
What kind of pets does Mr. Fischer have?
Birds (3 cockatiels)
300
A group of participants that the treatment group is being compared to is called the _______.
Control Group
300
What is a Null Hypothesis?
The hypothesis that states their is no change in what is expected.
300
One way to get a representative sample of vehicle registrations across the whole country would be to number a list of all of the sates in the U.S., and then use a random number generator (RNG) to pick out 4 or 5 states. From each state, she could then number the counties, use an RNG to pick a county or two, and then repeat to identify cities or towns. By narrowing down the extremely large initial population in this way, she can maintain the randomness of her sample without needing to number every car owner in the U.S.
Which method of sampling is this?
Cluster
300
Write an open-ended question for the following:
Do all my teachers like their job?
Why do you like your job?
What is something about your job that you like?
(There are many different ways to write an open-ended question)
300
Who does Mr. Nations think he looks like (celebrity)?
Luke Combs
400
Half of the teachers who ordered a regular coffee at their neighborhood Starbucks were unknowingly given decaf. Both groups reported increased alertness. This is an example of the ______.
Placebo Effect
400
What is an Alternative Hypothesis?
The hypothesis that states something is different or has changed.
400
Which sampling method is this?
Putting all the names of students in a class into a hat and then randomly drawing out a handful of names to form a smaller sample group, where each student has an equal chance of being selected
Simple Random Sampling
400
Write an open-ended question for the following:
The summer break should be longer.
Why should summer break be longer?
400
What size shoe does Mr. Fischer have on right now?
12
500
The leg muscles of men aged 60 to 75 were 50% to 80% stronger than they were previously after they all participated in a 16-week high-intensity resistance training program twice a week. Answer the following:
1. Is this Experimental or Observational? Why?
2. What is the Variable of Interest?
1. Experimental, they changed something that they were doing (participation in program).
2. The leg muscles of men aged 60 to 75.
500
Free Space
Free Space
500
Which sampling method is this?
selecting every 5th customer from a list of 1,000 customers to survey, where you first randomly choose a starting point within the first five customers and then continue selecting every 5th customer from that point onwards
Systematic Sampling
500
Write an open-ended question for the following prompt:
The best teachers are math teachers.
Why are math teachers the best teachers?
What do you think makes the best teachers?
500
What has been your favorite thing about the class this year?
Tell me...