1. A manufacturer of running shoes knows that the average particular model of shoes is 15 months. Someone in the research and development division of the shoe company claims to have developed a longer lasting product. This new product was worn by 30 individuals and lasted on average for 17 months. The variability of the original shoe is estimated based on the standard deviation of the new group which is 5.5 months. Is the designer's claim of a better shoe supported by the trial results? Please base your decision on a two tailed testing using a level of significance of p< .05. lifetime for a

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1. A manufacturer of running shoes knows that the average
particular model of shoes is 15 months. Someone in the research and
development division of the shoe company claims to have developed a longer
lasting product. This new product was worn by 30 individuals and lasted on
average for 17 months. The variability of the original shoe is estimated based on
the standard deviation of the new group which is 5.5 months. Is the designer's
claim of a better shoe supported by the trial results? Please base your decision on
a two tailed testing using a level of significance of p <.05.
lifetime for a
2. Average heart rate for Americans is 72 beats/minute. A group of 25 individuals
participated in an aerobics fitness program to lower their heart rate. After six
months the group was evaluated to identify is the program had significantly
slowed their heart. The mean heart rate for the group was 69 beats/minute with a
standard deviation of 6.5. Was the aerobics program effective in lowering heart
rate?
Transcribed Image Text:1. A manufacturer of running shoes knows that the average particular model of shoes is 15 months. Someone in the research and development division of the shoe company claims to have developed a longer lasting product. This new product was worn by 30 individuals and lasted on average for 17 months. The variability of the original shoe is estimated based on the standard deviation of the new group which is 5.5 months. Is the designer's claim of a better shoe supported by the trial results? Please base your decision on a two tailed testing using a level of significance of p <.05. lifetime for a 2. Average heart rate for Americans is 72 beats/minute. A group of 25 individuals participated in an aerobics fitness program to lower their heart rate. After six months the group was evaluated to identify is the program had significantly slowed their heart. The mean heart rate for the group was 69 beats/minute with a standard deviation of 6.5. Was the aerobics program effective in lowering heart rate?
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