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
Stacey Warren - Expert brainly.com
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Do you know the formula for finding the confidence interval?
what do u think
I forgot it :'(
But I think the answer is A
i think A too
Can you help me with a couple more please @slade?
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
I think the answer to that is B or C
i think C
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.