An article in the Archives of Internal Medicine reported that in a sample of 244 men, 73 had elevated totalcholesterol levels (more than 200 milligrams per deciliter). In a sample of 232 women, 44 had elevatedcholesterol levels. Can you conclude at the 0.05 significance level that the proportion of people withelevated cholesterol levels differs between men and women?

Given that Sample size n1=244 , n2=232 Favorable cases x1=73, x2=44

Answered: article in the Archives of Internal…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A new type of fertilizer is being tested on a plot of land to see whether it increases the amount of fruit produced. The mean number of pounds of fruit harvested on this plot of land with the old fertilizer was 400 pounds. The scientists believe the new fertilizer may yield more than the old one. State the appropriate null and alternative hypotheses.
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What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the test? H: u is ? ? Н H: µ is ? ? In the context of this test, what is a Type I error? A Type I error is ? v the hypothesis that u is ? ? v when, in fact, u is ? Suppose that the researcher decides not to reject the null hypothesis. What sort of error might he be making? ?
Before every flight, the pilot must verify that the total weight of the load is less than the maximum allowable load for the aircraft. The Bombardier Dash 8 aircraft can carry 37 passengers, and a flight has fuel and baggage that allows for a total passenger load of 6200 lb. The pilot sees that the plane is full and all passengers are men. The aircraft will be overloaded if the mean weight of the passengers is greater than 6200lb/37 = 167.6lb. What is the probability that the aircraft is overloaded? Should the pilot take any action to correct for an overloaded aircraft? Assume that weights of men are normally distributed with a mean of 185.47 lb and a standard deviation of 39 lb. make sure to include pdf
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PLEASE ANSWER ASAP: A case-control study was conducted to evaluate the relationship between physical activity and coronary heart disease (CHD) in men. A total of 406 men newly diagnosed with CHD were included together with 406 men of similar ages who did not have CHD. The risk of CHD (measured by the OR) was higher among men who were inactive or only moderately active (collectively called ‘inactive’) than among those who were physically active: (See attached image) Odds ratio for inactive men compared to active men= (299 x 136)/(270 x 107)=1.41Suppose there is no misclassification in these data.What would the observed OR have been... 1. If 20% of all the inactive men had been misclassified as active? 2. If 10 % of inactive cases had been misclassified as active?
You are estimating the mean blood plasma volume in male firefighters and you’ve decided to usethe sample mean, ?̅, as the estimator. Explain why ?̅ has a normal sampling distribution

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