6) Confidence Interval And Hypothesis Testing Flashcards Preview

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Flashcards in 6) Confidence Interval And Hypothesis Testing Deck (5)
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1
Q

Central limit theorem

A

The distribution of means from sample size n, obtained on a population with standard deviation s, converges to a normal distribution with the same mean as the population and standard deviation given by s/sqrt(n)

2
Q

Confidence interval

A
  • the population mean is in the itnerval u +- 2SE with 95% confidence
  • the interval pop mean +- 2SE contains 95% of the means from the samples drawn from the population

SE = s/sqrt(n)

3
Q

P value

A
  • probability of having a sample with a mean as extreme or more extreme than X, assuming that Ho is true
  • the smaller the p value, the less likely Ho is true
  • if small p value -> reject Ho
4
Q

True or false: P value is the probability of Ho being true?

A

False

5
Q

True or false: High p value means that Ho is true

A

NO