A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. They sampled 240 students and found a mean of 22.3 hours per week. Assuming a population standard deviation of six hours, what is the confidence interval at the 95% level of confidence?
Added by Julian B.
Step 1
Given that the population standard deviation is 6 hours and the sample size is 240, we can use the formula for the margin of error: Margin of Error = Z * (σ / √n) where Z is the Z-score corresponding to the desired level of confidence (95% confidence level Show more…
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a group of statistic students decided to conduct a survey at their university to estimate the average (mean) amount of time students spent studying per week. The sampled 554 students and found a mean of 22.3 hours per week. Assuming a population standard deviation of 6 hours, what is the 95% level of confidence
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