During the independent research 30 women were chosen to measure their weight. The mean value of weight...
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During the independent research 30 women were chosento measure their weight. The
mean value of weight is 66 kg and it is known from the previousexperience that the weight is normally
distributed with ? = 10 kg.
a) Find a 95% two-sided confidence interval on the mean weight.
b) Find a 90% two-sided confidence interval on the meanweight.
c) Which interval is wider?
During the independent research 30 women were chosento measure their weight. The
mean value of weight is 66 kg and it is known from the previousexperience that the weight is normally
distributed with ? = 10 kg.
a) Find a 95% two-sided confidence interval on the mean weight.
b) Find a 90% two-sided confidence interval on the meanweight.
c) Which interval is wider?
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Solution Given thatPoint estimate sample mean
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