A random sample of 11 items is drawn from a population whose standard deviation is unknown. The sample mean is x¯x= 920 and the sample standard deviation iss = 25. Use Appendix D to find the values of Student’st.(a) Construct an interval estimate ofμ with 95% confidence.(Round your answers to 3 decimal places.)
(b) Construct an interval estimate ofμ with 95% confidence, assuming thats = 50.(Round your answers to 3 decimal places.)
(c) Construct an interval estimate ofμ with 95% confidence, assuming thats = 100.(Round your answers to 3 decimal places.)
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