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Problem for Texas Instruments TI-89 Calculator
Using the z-interval function
By herberto_sal on Nov 27, 2008
Hi,
I can do it using calculus and the long ways, but I need to learn how to use the TI-89 (exams don't give us enough time for calculus/long methods).
Normally distributed population; std dev = 280; random sample, n = 64; mean, xbar = 1200. Estimate the mean, mu, for the entire population. Develope the 95% confidence interval for the population mean, mu.
a) Find corresponding z-values (95% confidence)
b) find the corresponding x-values
I can do it using calculus and the long ways, but I need to learn how to use the TI-89 (exams don't give us enough time for calculus/long methods).
Normally distributed population; std dev = 280; random sample, n = 64; mean, xbar = 1200. Estimate the mean, mu, for the entire population. Develope the 95% confidence interval for the population mean, mu.
a) Find corresponding z-values (95% confidence)
b) find the corresponding x-values
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