Flashcards
Chapter 13
Flashcards do conjunto (8)
- 1single sample (tss)What you use when you have everything from standard z test except for the POPULATION STANDARD DEVIATION
- 2When are t & z tests the same?When the sample size is 130 or more
- 3Differences in z & t testst single distribution
Degrees of freedom - 4Degrees of FreedomIt's an indication of the N size (proxy)
How many people are in the sample
It's job is to give you the 5% cutoff in the right t distribution
df=N-1 - 5Confidence Intervalrange of values that probably contains the population value
- 6Confidence limitsvalues that bound the confidence interval
- 795% Confidence Intervalan interval such that the probability is .95 that the interval contains the popluation value
- 8Use of the t test?testing hypotheses involving single sample experiments
estimating population mean by constructing confidence intervals
testing the significance of Pearson r
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- Statistics (Chapter 13) FlashCards sobre Chapter 13, criado por nicknicknicke em 08-10-2013.
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