A survey asked a random sample students if they estimated they spent more or less than an hour a day on social media. Social Media More Less Total 7th grade 2913 4 ^ 2 8th grade 171532 Total 4628 74 How many 7th graders estimated they spend less than an hour a day on social media ?

Can someone me i’m confused. will give brainliest and a whole bunch of points

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

Complete this sentence with the best of choices given