For which of the following scenarios should you use a matched pairs design and test?
1 point
1
Question 2
2.
Before you took this course, you may have heard stories about how difficult Statistics can be. Oftentimes, parents have had bad experiences with Stats courses and pass on their anxieties to their kids. To test whether actually taking AP Stats actually decreases students' anxieties about Stats, an instructor gave a test to rate student anxiety at the beginning of the course and at the end of the course. Anxiety levels were measured on a scale of 1-10. Here are the data for 16 randomly chosen students from a class of 180 students.
What type of hypothesis test will you complete?
1 point
1
Question 3
3.
Before you took this course, you may have heard stories about how difficult Statistics can be. Oftentimes, parents have had bad experiences with Stats courses and pass on their anxieties to their kids. To test whether actually taking AP Stats actually decreases students' anxieties about Stats, an instructor gave a test to rate student anxiety at the beginning of the course and at the end of the course. Anxiety levels were measured on a scale of 1-10. Here are the data for 16 randomly chosen students from a class of 180 students.
What type of hypotheses will you test?
1 point
1
Question 4
4.
Which histogram(s) should we check for the Nearly Normal condition?
1 point
1
Question 5
5.
How do we check the Independence Assumption? (check all that apply)
1 point
1
Question 6
6.
Before you took this course, you may have heard stories about how difficult Statistics can be. Oftentimes, parents have had bad experiences with Stats courses and pass on their anxieties to their kids. To test whether actually taking AP Stats actually decreases students' anxieties about Stats, an instructor gave a test to rate student anxiety at the beginning of the course and at the end of the course. Anxiety levels were measured on a scale of 1-10. Here are the data for 16 randomly chosen students from a class of 180 students.
Does this provide evidence that anxiety levels about Statistics decrease after students take AP Statistics? (You'll need the df, t-statistic, and p-value for the next few answers, so I would write them down)
How many degrees of freedom does this test have?
1 point
1
Question 7
7.
What is the value of the t-statistic? (round to three decimals)
1 point
1
Question 8
8.
What is the p-value? (round to five decimals)
1 point
1
Question 9
9.
Which two parts should make up your conclusion?
1 point
1
Question 10
10.
Before you took this course, you may have heard stories about how difficult Statistics can be. Oftentimes, parents have had bad experiences with Stats courses and pass on their anxieties to their kids. To test whether actually taking AP Stats actually decreases students' anxieties about Stats, an instructor gave a test to rate student anxiety at the beginning of the course and at the end of the course. Anxiety levels were measured on a scale of 1-10. Here are the data for 16 randomly chosen students from a class of 180 students.
Create a 90% confidence interval to estimate the mean decrease in anxiety about Statistics. Use format (.888,.999) no spaces, with parentheses, three decimal places.
1 point
1
Question 11
11.
Write your conclusion.
1 point
1
Question 12
12.
To be sure your hypothesis test is consistent with your confidence level of 90%, what alpha level should you use?
1 point
1
Question 13
13.
Perhaps it is true taking the AP Statistics course doesn't really decrease anxiety about statistics. Was an error made? If so, what kind? (check all that apply)