A class survey in a large class for first-year college students asked, “about how many hours do you study during a typical week?” the mean response of the 463 students was 13.7 hours. suppose that we know that the study time follows a normal distribution with standard deviation of 7.4 hours in the population of all first-year students at this university. A) use the survey result to give a 99% confidence interval for the mean study time of all first year students. B) what condition not yet mentioned must be met for your confidence interval to be valid?

answer: your answer is a

there are no choices to this, can you give us some choices so that i can answer it

step-by-step explanation:

mariah is studying the life cycle of the monarch butterfly. she must choose one stage in the cycle to present in science class: egg, caterpillar, chrysalis, or adult. she plans to make her choice randomly using a custom spinner divided into four sections. first, however, she spins the spinner 50 times to see the frequencies it generates.

stage times landed on

egg 10

caterpillar 12

chrysalis 15

adult 13

step-by-step explanation: