1.which intervals can be contrasted using one sample interval computations on the differences?

paired,pooled, nonpaired , how do you determine pooled vs non pooled?

2. true mean $2.75 random sample 100 current price is $2.65 with standard dev. .20 conduct test at 10% significance level

-state assumptions and if they are met define pararmeters, null and alternative hypothesis, DF, p value, and state conclusion in context of hypothesis