Alice wanted to compare birthday cake prices in two supermarkets. She wrote down the daily prices for a few days and found that
the difference of the two sample means is $4.01. The standard deviation of the difference of the sample means is $5.46. The 95% confidence interval of the sample mean difference is between and
On a number line, v would be all the numbers to the left of -3 (for example, |-4|=4 which is greater than 3) and all the values to the right of positive 3. Since it can't equal 3, v=-3 and v=3 are not included on the number line.
