Wondersixeleven
17.12.2021 •
Mathematics
A study was designed to compare cardiac demands of snow shoveling to those of using an electric snow thrower. Ten subjects cleared tracts of snow using both methods and their maximum heart rates (beats per minute) were recorded. In this sample, the mean maximum heart rate during manual snow shoveling was 175 and the standard deviation was 15. Assuming the sample data have a bell-shaped distribution, you need to construct a 95% confidence interval estimate of the population mean for those who shovel snow. What value should you use for the standard error
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Ответ:
42 teaspoons of vinegar should be used
Step-by-step explanation:
This question is solved by proportions, using a rule of three.
4 teaspoons of vegetable oil and 12 teaspoons of vinegar. 14 teaspoons of vegetable oil were used
So
4 teaspoons of vegetable oil - 12 teaspoons of vinegar
14 teaspoons of vegetable oil - x teaspoons of vinegar
So
Dividing both sides by 4:
42 teaspoons of vinegar should be used