Valuate the line integral, where c is the given curve. ∫c zdx + xdy + ydz c. x = t2, y = t3, z = t2, 0 ≤ t ≤ 1

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?