A variable of a population has a mean of 266 and a standard deviation of 16. Ten

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A variable of a population has a mean of 266 and a standard deviation of 16. Ten observations of this variable have a mean of 262.1 and a sample standard deviation of 20.4. Obtain the observed value of the
a. Standardized version of x-bar.
b. Studentized version of x-bar.
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