The difference of the sample means of two populations is 34.6, and the standard deviation of the difference of the sample means is 11.9.
the 95% confidence interval lies between (a.-11.9, b.-23.8, c.-35.7, d.-45.4) and (a.+11.9, b.+23.8, c.+35.7, d.+45.4)

option 1

data plot with   3 dots over 33, 1 dot over 34, 2 dots over 35, no dot over 36, 1 dot over 37, 2 dots over 38, 4 dots over 39, and 2 dot over 40.

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%

you first to choose the points and then move from then as the slope you have