Here are summary statistics for randomly selected weights of newborn​ girls: nequals=170170​, x overbarxequals=27.827.8 ​hg, sequals=7.97.9 hg. Construct a confidence interval estimate of the mean. Use a 9090​% confidence level. Are these results very different from the confidence interval 26.826.8 hgless than

When 77 campers are randomly selected and surveyed, it was found that the average number that prefer to camp at the beach was 16. Assume the population standard deviation is 2.3. Construct a 90% confidence interval for the true population mean of the number of campers who prefer to camp at the beach. Give your answers to 3 decimal places. Error =

Let’s suppose a sample of 36 American teenagers (randomly selected from a normally distributed population) watches an average of 1450 hours of television per year with a standard deviation of 239 hours. Construct the 95% confidence interval (CI) for the mean number of hours the population of American teenagers watch television per year

An SRS of 29 students at HCC gave an average height of 5.5 feet and a standard deviation of .1 feet. Construct a 90% confidence interval for the mean height of students at HCC.

An article claims that babies spend twice as much time in REM (rapid eye movement) sleep than adults. This implies that babies have an average of 6 hours of REM sleep per night. A doctor would like to test the hypotheses = 6 versus  ≠ 6 where  = the true mean amount of REM sleep per night for babies. A 95% confidence interval for the true mean amount of REM sleep per night for babies is (5.45, 6.25) hours. Based on the confidence interval, what conclusion would you make for a test of these hypotheses? The 95% confidence interval  include  as a plausible value, so we  H0. We  convincing evidence that the true mean amount of REM sleep per night for babies  6 hours.

Construct a 95% confidence interval for the true mean of city mileage (MPG) of all cars with a manual transmission. Assume that MPG of cars with a manual transmission follows a normal distribution. Also, provide an interpretation of the confidence interval in context. Here is my work so far Manual and Automatic Transmission Total # of Cars = 1129 Total # of Automatic Trans. = 877 Total # of Manual Trans.  = 252 Average (Auto) = 18.97948 Average (Manual) = 20.69841 Standard Deviation (Auto) = 8.390146 Standard Deviation (Manual) = 8.565189 Automatic Min: 8 Q1: 15 Median:  18 Q3: 21 Mode: =MAX(B2:B878) = 126 Manual Min: 11 Q1:  18 Median:  20 Q3: 24 Mode:  31

A city planner wants to estimate the average monthly residential water usage in the city. He selected a random sample of 42 households from the city, which gave the mean water usage to be 3409.30 gallons over a one-month period. Based on earlier data, the population standard deviation of the monthly residential water usage in this city is 387.90 gallons. Make a 97% confidence interval for the average monthly residential water usage for all households in this city.

A data set includes 106 body temperatures of healthy adult humans having a mean of 98.7°F and a standard deviation of 0.66°F. Construct a 99​% confidence interval estimate of the mean body temperature of all healthy humans. What does the sample suggest about the use of 98.6°F as the mean body​ temperature?

A data set includes 106 body temperatures of healthy adult humans having a mean of 98.9 degrees F and a standard deviation of 0.62 degrees F. Construct a 99 % confidence interval estimate of the mean body temperature of all healthy humans. What does the sample suggest about the use of 98.6 degrees F as the mean body temperature? What is the confidence interval estimate of the population mean? Round to three decimal places as needed.