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Shea wants to estimate the difference between two population means and plans to use data collected...

Shea wants to estimate the difference between two population means and plans to use data collected from two independent simple random samples of sizes ?1=27 and ?2=32. She does not know the population standard deviations, so she plans to construct a two-sample ?-confidence interval for the difference in the two means.

Use a ?‑distribution table to determine the positive ?‑critical value needed to construct a 95% confidence interval using a conservative estimate of the number of degrees of freedom.

Enter the positive critical value precise to three decimal places.

Math   Statistics-And-Probability   
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