Question

In a sample of 50 households, the mean number of hours spent on social networking sites during the month of January was 45 hours. In a much larger study, the standard deviation was determined to be 8 hours. Assume the population standard deviation is the same. What is the 95% confidence interval for the mean hours devoted to social networking in January?
The 95% confidence interval ranges from 8 to 45 hours.
The 95% confidence interval ranges from 40.13 to 45.78 hours.
The 95% confidence interval ranges from 43.87 to 46.13 hours.
The 95% confidence interval ranges from 42.78 to 47.22 hours

Answer 1

@selena44 @slade @LegendarySadist @NeonStrawsForever @mastermindkakashi @ashontae19 @rnojito @Ricky-valencia @Rahammii @Robert136

Answer 2

@Alex.

Answer 3

@abb0t

Answer 4

sorry bro

Answer 5

@undeadknight26

Answer 6

Do you know the formula for finding the confidence interval?

Answer 7

what do u think

Answer 8

I forgot it :'(
But I think the answer is A

Answer 9

i think A too

Answer 10

Can you help me with a couple more please @slade?

Answer 11

When critiquing an observational study, which four factors should be analyzed?
Methodology, Results, Discussion, Conclusion
Introduction, Results, Discussion, Conclusion
Introduction, Methodology, Results, Discussion
Methodology, Causes, Results, Discussion

Answer 12

sure

Answer 13

I think the answer to that is B or C

Answer 14

i think C

Answer 15

Cameron conducted an observational study to learn how finances affect happiness. He surveyed 700 people in his hometown and found that 80% say the more money they have, the more happiness they experience. What conclusion can Cameron draw from his study?
Financial stability is the only factor that contributes to happiness.
Financial stability results in happiness.
There may be a link between financial stability and happiness.
Happiness results in financial stability.

Answer 16

I'm lost on this one.

Answer 17

idk this one srry but @DanJS could problely help