A financial analyst for one such company has recently computed that the firm would make a profit if the mean weekly recycled newspaper collection from each household exceeded 2.0 pounds. In a study to determine the feasibility of a recycling plant, a random sample of 148 households was drawn from a large community, and the weekly weight of newspapers discarded for recycling for each household was recorded. The sample mean and standard deviations were 2.18 and 0.98, respectively. Do these data provide sufficient evidence to allow the analyst to conclude that a recycling plant would be profitable?
The mean weight of newborn infants at a community hospital is previously known to be 6.6 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0, 7.3, 6.0, 8.8, 6.8, 8.4, and 6.6 pounds.
- Hypothesis
- Critical value at 5% significant level
- Sample mean and standard deviation
- Test statistics
- What is the decision for a statistical significant change in average weights at birth at the 5%
level of significance?
- What is the decision for a significant increase in the average birthrate at a 5% level of
significance?
Please explain it with steps and details, thanks!!
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