Calculate a 95% confidence interval for the difference in true proportion of the carrier bags which burst between jicama type A and type B. Give comment on the parameter estimate.
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QUESTION 3
The Research Unit for Cecilion Supermart conducted an experiment to estimate the strength of the
carrier bag from the starch-based biofilms made from two different jicamas (sengkuang) of type A
and type B. However, the researcher claims that jicama type A produces more strength compared
to type B. To support this claim, 10kg weight item was put into 100 carrier bags made from jicama
type A and 200 carrier bags made from jicama type B were randomly selected. As a result, 8 bags
from jicama type A burst while 12 bags from jicama type B burst. Calculate a 95% confidence
interval for the difference in true proportion of the carrier bags which burst between jicama type A
and type B. Give comment on the parameter estimate.
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- Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to be attractive. One study presented 200 young American men with 100 images of men with various levels of muscle. Researchers measure level of muscle in kilograms of fat‑free body mass per square meter of body surface area (kg/m2). Typical young men have about 20 kg/m2.. Each subject chose two images, one that represented his own level of body muscle and one that he thought represented "what women prefer." The mean gap between self‑image and "what women prefer" was 2.35 kg/m2.. Suppose that the "muscle gap" in the population of all young men has a Normal distribution with standard deviation 2.5 kg/m2.. If young men thought that their own level of muscle was about what women prefer, the mean "muscle gap" in the study would be 0. We suspect (before seeing the data) that (most) young men tend to think women prefer more muscle than they themselves have. What is the value of the test…The Research Unit for Cecilion Supermart conducted an experiment to estimate the strength of the carrier bag from the starch-based biofilms made from two different jicamas (sengkuang) of type A and type B. However, the researcher claims that jicama type A produces more strength compared to type B. To support this claim, 10kg weight item was put into 100 carrier bags made from jicama type A and 200 carrier bags made from jicama type B were randomly selected. As a result, 8 bags from jicama type A burst while 12 bags from jicama type B burst. Calculate a 95% confidence interval for the difference in true proportion of the carrier bags which burst between jicama type A and type B. Give comment on the parameter estimate.Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to be attractive. One study presented 200 young American men with 100 images of men with various levels of muscle. Researchers measure level of muscle in kilograms of fat-free body mass per square meter of body surface area (kg/m2). Typical young men have about 20 kg/m?. Each subject chose two images, one that represented his own level of body muscle and one that he thought represented "what women prefer." The mean gap between self-image and "what women prefer" was 2.35 kg/m?. Suppose that the "muscle gap" in the population of all young men has a Normal distribution with standard deviation 2.5 kg/m2. If young men thought that their own level of muscle was about what women prefer, the mean "muscle gap" in the study would be 0. We suspect (before seeing the data) that (most) young men tend to think women prefer more muscle than they themselves have. What is the value of the test statistic z?…
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