Question

MEDAL AND FAN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! HELP?

In a sample of 200 households, the mean number of hours spent on social networking sites during the month of January was 55 hours. In a much larger study, the standard deviation was determined to be 7 hours. Assume the population standard deviation is the same. What is the 99% confidence interval for the mean hours devoted to social networking in January?

Answer 1

The 99% confidence interval ranges from 53.73 to 56.27 hours.
The 99% confidence interval ranges from 7 to 55 hours.
The 99% confidence interval ranges from 54.51 to 55.49.
The 99% confidence interval ranges from 55 to 60 hours.

Answer 2

@phi

Answer 3

@Jaynator495

Answer 4

@slade

Answer 5

Sorry i thought iknew but i dont

Answer 6

its ok ty

Answer 7

ok got it what do u think it is

Answer 8

I have no idea how to solve it so if i guessed i would say c

Answer 9

u got it correct

Answer 10

how?

Answer 11

did u just gess

Answer 12

yes completely

Answer 13

hahaha good job u got a gift but u need to do the math next time

Answer 14

ok! TYSM!!!!

Answer 15

welcome