Assignment
Statistical testing and bivariate analysis Part 1
Dear student,
Below you find the assignment of Week 2 of Research and Statistics.
- Make the assignment using SPSS and put the answers/tables in the file below.
- Upload the assignment as pdf in Canvas.
- Go to the internet quiz https://tueindhoven.limequery.com/333666?lang=en and fill in the
answers there. Copy-and-paste the link to your browser.
Please enter the id-number that is represented on your student ID-card in the
orange section of the card.
Otherwise you will not be recognized!
The computer will process your answers and you will receive personalized feedback on what
you did correct or wrong.
1
, Theory distributions, one-sample t-test
The questions below are based on the lecture
L1. Take a normally distributed variable with a mean Mu and a standard deviation Delta. What
percentage of the values falls within the interval [Mu − Delta, Mu + Delta]? A
A. 68%
B. 95%
C. 99%
L2. A standard normal distribution has: A
A. A mean of 0 and a standard deviation of 1
B. A mean of 1 and a standard deviation of 0
L3. To standardize a variable (bring its distribution to a standard normal distribution) one needs to: B
A. Subtract the standard deviation and divide the result by the mean
B. Subtract the mean and divide the result by the standard deviation
L4. We have a data sample with people visiting a shopping centre. The variable ‘distance between
home and shopping centre’ is normally distributed, has a mean of 2 km and a standard deviation of 3
km.
You want to know which percentage of visitors lives within the distance of 5 km from the shopping
centre. Calculate the z-value that will help you to compute this percentage. 1
Calculate the 95% confidence interval for the mean distance between home and shopping centre.
Assume that the sample contains 2000 observations.
Which critical t-value should you use? 1.96
What is the left range of the interval? 1.87
What is the right range of the interval? 2.13
2
Statistical testing and bivariate analysis Part 1
Dear student,
Below you find the assignment of Week 2 of Research and Statistics.
- Make the assignment using SPSS and put the answers/tables in the file below.
- Upload the assignment as pdf in Canvas.
- Go to the internet quiz https://tueindhoven.limequery.com/333666?lang=en and fill in the
answers there. Copy-and-paste the link to your browser.
Please enter the id-number that is represented on your student ID-card in the
orange section of the card.
Otherwise you will not be recognized!
The computer will process your answers and you will receive personalized feedback on what
you did correct or wrong.
1
, Theory distributions, one-sample t-test
The questions below are based on the lecture
L1. Take a normally distributed variable with a mean Mu and a standard deviation Delta. What
percentage of the values falls within the interval [Mu − Delta, Mu + Delta]? A
A. 68%
B. 95%
C. 99%
L2. A standard normal distribution has: A
A. A mean of 0 and a standard deviation of 1
B. A mean of 1 and a standard deviation of 0
L3. To standardize a variable (bring its distribution to a standard normal distribution) one needs to: B
A. Subtract the standard deviation and divide the result by the mean
B. Subtract the mean and divide the result by the standard deviation
L4. We have a data sample with people visiting a shopping centre. The variable ‘distance between
home and shopping centre’ is normally distributed, has a mean of 2 km and a standard deviation of 3
km.
You want to know which percentage of visitors lives within the distance of 5 km from the shopping
centre. Calculate the z-value that will help you to compute this percentage. 1
Calculate the 95% confidence interval for the mean distance between home and shopping centre.
Assume that the sample contains 2000 observations.
Which critical t-value should you use? 1.96
What is the left range of the interval? 1.87
What is the right range of the interval? 2.13
2
