In order for you to compare the scores between sampling distributions you will need to standardize the scores. Imagine telling your friend that you have scored 90 for your finance and 60 for you statistics, your friend would naturally think you are a lot stronger in your finance. However, if the average marks in the …
What is the difference between parameters and statistics? Parameters are used to describe populationStatistics are used to describe sample Examples of Parameters 1. Population mean = μ2. Population Standard deviation = σ3. Population size = N Examples of Statistics 1. Sample mean = X2. Sample standard deviation = s3. Sample Size = n SMS 9758-7925 or …
Sampling distribution is: A distribution that results from taking repeated samples from the same population and calculating the statistic (mean and standard deviation) on each sample and then plot them into a distribution Picture Credit: Social Research Methods Read more about:What is skewed distribution? Having problem with you statistics? SMS 9758-7925 or email enquiry@starcresto.com for business statistics tuition, psychology statistics tuition, statistics tuition =)
1. Getting data of the population might be difficult as it might not be possible or cost effective 2. Taking data from one sample will not give you a distribution 3. A distribution is necessary to find out proportion and testing for significance Read up on:What is Sampling Distribution? Having problem with you statistics? SMS 9758-7925 or email enquiry@starcresto.com for …
Where: X is the sample meanM is the population meanSigma is the population standard deviationn is the sample size Read up more about:The difference between sample and population mean, sample and population standard deviation SMS 9758-7925 or email enquiry@starcresto.com for business statistics tuition, psychology statistics tuition, statistics tuition =)
It is used to: Compare the results of the study with the sampling distribution of the statistic we used With a probability criterion that we have set or is given in the question (significance level) In a nutshell, it means, it is used to test a claim SMS 9758-7925 or email enquiry@starcresto.com for business statistics tuition, psychology statistics …
What is the alternative hypothesis? It is the research hypothesis, also called the alternative hypothesis H1 or Ha What is the null hypothesis H0 ? It is the opposite of the research hypothesis – differences are due to chance There will be no differences in reaction times between sleep deprived and normal subjects” If …
Step 1: State the hypothesis claim Always think about the alternative hypothesis (H1) first. If the question states “ I am trying to find out if the average weight is greater than 50kg” then the alternate hypothesis will be: average mean more than 50 hence null hypothesis (Ho) will just be less than or equal …
Central limit theorem states that as sample size (n) increases, the shape of the sampling distribution of the mean becomes closer to normal no matter what the shape of the distribution of the population. The rule of thumb is when sample size is more than or equal to 30, the distribution will be relatively normal regardless …
For most schools & textbooks Z test is used when n > 30 or when population standard deviation is known t Test is used when underlying population is normal and when n < 30 or when population standard deviation is unknown You can also ask yourself this question to identify the test used:Is population standard deviation …