From the estimation of the number of aggravated assault (1,092,090) in 2014 at a 95% confidence interval (CI), what is the lower limit?
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From the estimation of the number of aggravated assault (1,092,090) in 2014 at a 95% confidence interval (CI), what is the lower limit? (Round off to one decimal place if necessary).
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- A Businessweek/Harris survey asked senior executives at large corporations their opinionsabout the economic outlook for the future. One question was, “Do you think that therewill be an increase in the number of full-time employees at your company over the next12 months?” In the current survey, 220 of 400 executives answered Yes, while in a previous year survey, 192 of 400 executives had answered Yes. Provide a 95% confidenceinterval estimate for the difference between the proportions at the two points in time. Whatis your interpretation of the interval estimate?A researcher constructs a confidence interval using the value z*=1.44. What confidence level does their interval haveIn a recent year, 6% of cars sold had a manual transmission. A random sample of college students who owned cars revealed the following: out of 124 cars, 25 had manual transmissions. Estimate the proportion of college students who drive cars with manual transmissions with 90% confidence. Round intermediate and final answers to at least three decimal places.
- 3 see pictureAccording to a study, a cup of coffee contains an average of 118 milligrams (mg) of caffeine, with the amount poer cup ranging from 56 to 187 mg. Suppose you want to repeat the experiment in prder to obtain an estimate of the mean caffeine content in a cup of coffee correct to within 7 mg with 99% confidence. How many cups of coffee would have to be included in your sample? The experiment must sample cups of coffee in order to estimate the mean caffeine content in a cup of coffee correct to within 7 mg with 99% confidence. Round up to the nearest whole number.)(12) adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 88% confidence (Round to two decimal places). Estimate population proportion: New York Times poll found that 329 out of 763 12
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