This document contains answers for the assignment SPSS 3 of week 2 - Statistical testing and bivariate analysis Part 1 - for the course Research and Statistics 7U9X0 (old form) - Quantitative Research Methods and Statistics 7U0B20 (new form).
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.
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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
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