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Public Health and Nutrition
Rising costs caused many Americans to do without health insurance. A random sample of adults of various ethnicities was obtained and asked whether they had health insurance. The resulting data are given in the table below.
a. Find a 95% confidence interval for the proportion of adults without health insurance for each group.
b. A government publication claims that the proportion of people without health insurance for the general population is 0.146. Using the confidence intervals in part (a), is there evidence that any group has a different population proportion without health insurance?
A student is measuring assertiveness with an interval scale. Is it correct to say that a score of 30 on the scale represents half as much assertiveness as a score of 60? Explain.
A survey was conducted to measure the height of men. In the survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 67.8 inches and a standard deviation of 4.0 inches. A study particip..
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15 watch between 10 and 15 hrs per week and 10 watch less than 10 hrs per week. Determine whether there is a relationship between education levels and hours spent watching TV.
a manufacturer knows that their items have a normally distributed lifespan with a mean of 3.1 years and standard
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