Statistics 質問
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Give the formula of the sample's standard deviation for a sample size n
How can we measure how good we expect our estimate of the mean to be close to the true mean of the population, for a sample size n and a SD 𝜎?
How can we know if two means are significantly different?
What is the trade off for the choice of the criterion in an hypothesis test?
How is the effect size of a study with a small sample size and small p-value compared to a study with a larger sample size and same p-value?
What increases power more? A) An increase in sample size from 10 to 20B) An increase in sample size from 20 to 30
Explanatory values are also called...
What type of sampling is often more reliable than cluster sampling?
Experimental unites that are similar in ways that are expected to affect the response variable are grouped in...
If the information is obtained from a sample of a population and the purpose of the study is to use that information to draw conclusions about the population, what type of study is it?
When is a variable said to be a normally distributed variable or has a normal distribution?
If the purpose of the suited is to examine and explore information for its own inartistic interest only, what type of study is it?
What does a normal probability plot that does not fall in a straight line indicate?
What can a designed experiment help to create?
What type of numbers are on the left page of the table?
What type of numbers are on the right page of the table?
What are the numbers on the horizontal axis called?
For a normally distributed variable what does the percentage of all possible observations that lie within any specified range equal?
For a variable with a density curve, the percentage of all possible observations of the variable that lie within any specified range is equal to what approximately?
If the variable is normally distributed how should the normal probability plot look?