Concept explainers
To Calculate: the 95% confidence interval for the mean improvement in time to solve a maze when wearing a mask with a floral scent and tell about the confident that the scent does improve mean working time.
Answer to Problem 10.56E
(-4.7548, 6.6690)
There is 95% confident that the mean unscented time is between
Explanation of Solution
Formula used:
For confidence interval
Calculation:
DESCRIPTIVE MEASURES
The mean is
The sample having 21 data values:
The variance is
CONFIDENCE INTERVAL
The t-value by seeing in the row starting with degrees of freedom
The margin of error is
Confidence intervals are
There is 95% confident that the mean unscented time is between
Chapter 10 Solutions
Statistics Through Applications
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