Summary
Summary statistics 1 (faculty of spatial sciences)
- Course
- Institution
Summary of all the lectures of statistics 1, I got a 7,5 on my final exam, so i hope this can help you too!
[Show more]
Seller
Follow
GuusL
Content preview
Statistics 1 summary for final exam:Measurement Requirements Examples
level
Nominal Categorical, but no ranking Gender, hair color, type of
accommodation, genotype, religious
preference.
Ordinal Categorical and ranked School ranking, time of day, likert scale,
degree of satisfaction.
Interval Categorical, ranked and width Temperature, IQ, Time.
of intervals known
Ratio Categorical, ranked, width of Age, weight, height, sales figures,
intervals known, and natural 0- number of children, years of education.
point.
Population = the group that you wish to describe
Sample = the group for which you have data
You wish to make inferences about the population with help from the sample.
Parameter = numerical property of the population
Statistic = numerical property of a sample
Sampling error = difference between the value of a parameter and statistic computed to
estimate that parameter
1. Variability: repeated sampling from the same population results in different values for
statistic.
2. Sampling bias: procedures which favor the inclusion in your sample of elements from
the population with certain characteristics.
3. Non Sampling error: all sources of error that are unrelated to sampling.
Reducing sampling error:
- Increasing ‘n’, to decrease variability
- Design sampling procedure, to decrease sampling bias
- Validity, accuracy, precision of variables, prevent coding errors, prevent interpretation
errors, to decrease nonsampling error.
Central limit theorem: even if X is not normally distributed in the population, we may assume
that sampling distribution of the mean is approximately normal with standard error.
Types of sampling:
- Systematic: Population is already ordered in a particular way, like student numbers
which indicate time on uni.
- Cluster: work on the assumption that you have groups in the population that are more
or less similar, it doesn't really matter which one you pick.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GuusL. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.35. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53068 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now