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7) A random sample of 20 married women showed that the mean time spent on housework by them was 29.8 hours a week with a
7) A random sample of 20 married women showed that the mean time spent on housework by them was 29.8 hours a week with a standard deviation of 6.9 hours. Find a 90% confidence interval for the mean time spent on housework per week by all married women. Interpret the results
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