Statics Probability Question: Download Statics Probability PDF

Normal distribution theory tells us that for large samples, 95% of sample means lie within how many standard deviations above and below the population mean?

1. 95
2. 1.96
3. Whatever the z-score is.
4. The square root of the sample size.

Answer: 1.96

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We do not know whether the pattern of results found in our samples accurately reflects what is happening in the population or if it is the result of _____ error.	Consider the following data to answer the next 3 questions. You have the following sample data; a sample size of 7, a mean of 8 and a standard deviation of 4.2. From this, what is the standard error?