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Studies have shown that the risk of developing coronary disease increases with the level of obesity. A study comparing two methods of losing weight: diet alone and exercise alone were conducted on 82 men over 1-year period. Forty-two men dieted and lost an average of 16.0 lb over the year, with a standard deviation of 5.6 lb. Forty-?ve men who exercised lost an average of 10.6 lb, with a standard deviation of 7.9 lb. Construct a 99% con?dence interval for the difference in the mean weight loss by these two methods. State any assumptions you made and interpret the result you obtained.
Blood pressure measurements on adult males 30-39 years of age were obtained in a survey of a representative sample of Twin Cities households. To compare the frequency of hypertension in the white and non-white population surveyed, the most appropr..
a coffee company wants to make sure that there coffee is being served at the right temperature. if it is too hot the
someone working for a survey organization approached thefirst 100 students they saw on campus and noted that 52 of
The probability of drawing a 6 (to complete an inside straight) after discarding the ace.
beth seths sister sells ice cream in the same area as he and her daily sales follow the same pattern as his namely a
Calculate a 95% Confidence Interval for the following samples
Construct a 95% confidence interval for the population mean, assuming a normal distribution?
chi-squared a study is designed to investigate whether there is a difference in response to various treatments in
explain the difference between a left-tailed two-tailed and right-tailed test to include when would we choose each type
In the report, the researchers stated, "These results remain significant after adjustment for socioeconomic status." What does this mean? Can we conclude that a television in the bedroom causes a higher body mass index? Explain.
Line up for a family photo, with the condition that the youngest child is in the centre, how many distinguishable arrangements are there?
1.the daily flow rate of contaminant from an industrial plant is modeled by a normal random variable with a mean value
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