STAT 300 - College 1.2
Using a simulation, you will examine the proportions of heads that are likely if a fair coin is flipped 20 times. You will now construct a dotplot of 100 sample proportions based on random trials of 20 coin flips. Follow the instructions below to construct the dotplot in Statkey.
0.3 to 0.7
Select the statement below that best describes how the proportion 0.75 relates to the sample proportions in the dotplot. (for coin flip 15 out of 20 times - heads)
0.75 is unusual because it happens no more than 5 times out of 100 trials.
Which question below is a reasonable research question for this investigation? (study on hard to read text)
Do people think a task will be harder if the instructions for the task are harder to read?
Which question below is a reasonable research question for this investigation? (wii fit games and middle aged people)
Does the Wii Fit video game burn enough calories to be considered suitable exercise?
How are the data summarized? (font text)
Researchers compared the average amount of time that the two groups estimated that it would take to complete the tasks.
How are the data summarized? (wii fit)
Researchers found the average amount of calories that adults used up through exercising using the Wii Fit video game.
What did the researchers conclude? (wii fit)
The Wii Fit video game does not appear to burn enough calories in a 20-minute session, but a 30-minute session would possibly be enough.
Which statement below is a reasonable conclusion based on comparing the sample result of 0.80 to the simulated dotplot?
The outcome of 8 "Heads" in 10 flips is very unlikely, if the coin is fair. This observed sample result is unlikely to occur by chance alone, so there is evidence to conclude that the coin is not fair.
What data did the researchers collect to answer the research question?
The total amount of calories the adults burned through exercising.
What did the researchers conclude? (hard to read text)
There is evidence that people think a task will be harder when the instructions are harder to read. The conclusion is a statement about all people and is not limited to the people who participated in the study.
What variables are used to answer the research question? (font text)
Type of font & Amount of time a person thinks a task will take to complete.
