Question 1010600: HELP ME PLEASE?!
Consider a sample mean (xbar) of 46 calculated from a sample of size 51 drawn from a population of over 1000.
Would it be appropriate to use the standard score table to look up the probability of a standard (z) score calculated on these data? Why or why not?
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! unless i'm missing something, you don't have a standard deviation.
the standard deviation from the population is required in order to use the z-score.
if you had the standard deviation from the population, then it would be appropriate to use the z-score.
if you had the standard deviation from the sample, then it would be appropriate to use the t-score.
without the standard deviation of either the population or the sample, you would not be able to use the z-score or the t-score.
check your problem and see if the standard deviation is supplied.
if from the population, then a z-score is justified.
if from the sample, then a t-score is justified.
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