A random sample of ni = 246 people who live in a city were selected and 70 identified as a "dog person." A random sample of n2 = 112 people who live in a rural area were selected and 62 identified as a "dog person Find the 99% confidence interval for the difference in the proportion of people that live in a city who identi as a "dog person" and the proportion of people that live in a rural area who identify as a "dog person." Round answers to to 4 decimal places. < pi - p2 Question Help: Message instructor

The final grades of students in BC schools were chosen randomly from various classes, namely 77, 80, 87, 84, 55, 63. Create a 95% confidence interval to estimate the standard deviation of students scores in BC schools.

Researchers studying the spread of an insect called the hemlock woolly adelgid find that the bugs have infested 23% of a random sample of 345 hemlock trees in the study area. What's a 99% confidence interval for the population proportion of infested hemlock trees in the study area?

Results from the National Health and Nutrition Examination Survey (NHANES) conducted thirty years ago revealed that out of 378 randomly selected adults in the United States 57 were considered to be obese. In this year’s National Health and Nutrition Examination Survey, out of 426randomly selected adults in the United States 135 were considered to be obese. Use the results of the National Health and Nutrition Examination Survey and a 99% confidence interval to estimate the difference between the percentages of adults in the United States that are obese this year and thirty years ago. Express the estimate both symbolically and verbally.

of 101 randomly selected mothers, 17% indicated that they pay for private preschool, what is the 99% confidence interval for the proportion of mothers that pay for private preschool

A random sample of n - 236 people who live in a city were selected and 81 identified as a "dog person." A random sample of n2 - 109 people who live in a rural area were selected and 60 identified as a "dog person." Find the 90% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area who identify as a "dog person." Round answers to to 4 decimal places. P1 - P2 Question Help: Message instructor Submit Question Jump to Answer

A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 226 milligrams withs = 17.9 milligrams. Construct a 98% confidence interval for the true mean cholesterol content of all such eggs

in a random sample of 74 My daughter in Santa Clarita California each person who's asked if they support the death penalty. 33 adults in the sample so they do support the death penalty. What was the sample proportion of adults in Santa Clarita that support the death penalty? Calculate a 99% confidence interval estimate of the population percent of people in santa clarita that support the death penalty.