EasyStatistics
A One-Sample z-Statistic
Morgan StanleyGoldman Sachs
A sample of n = 25 has mean 103. Under the null hypothesis the population mean is 100 with known standard deviation 6. What is the z-statistic?
Approach
Standard error first: σ/√n.
Answer
Show the final answer
The answer is 2.5. Sign in free for the full worked solution and to check your own answer.
Related problems
Variance of Uniform(0,1)EasyVariance of a SumEasyCentral Limit TheoremEasyCovariance of a Linear TransformMediumRange of CorrelationEasyVariance of a Scaled VariableEasy
More in Statistics.