Babies: According to a recent report, a sample of 300 one-year-old baby boys in the United States had a mean weight of 25.5 pounds. Assume the population standard deviation is o=5.3 pounds. Part: 0 / 3 Part 1 of 3 (a) Construct a 99.9 % confidence interval for the mean weight of all one-year-old baby boys in the United States. Round the answer to at least one decimal place. A 99.9 % confidence interval for the mean weight in pounds of all one-year-old baby boys in the United States is

Salaries of 40 college graduates who took a statistics course in college have a​ mean, x overbar, of $64,200. Assuming a standard​ deviation, σ​, of ​$12,042​, construct a 95​% confidence interval for estimating the population mean μ.

Suppose that textbook weights are normally distributed.  You measure 30 textbooks' weights, and find they have a mean weight of 65 ounces. Assume the population standard deviation is 11.6 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Round answers to 2 decimal places.?        ?         ?

A random sample of 21 lunch orders at Noodles & Company showed a mean bill of $13.54 with a standard deviation of $6.45. Find the 98 percent confidence interval for the mean bill of all lunch orders. (Round your answers to 4 decimal places.)  The 98% confidence interval is from  _____to______

The mayor is interested in finding a 90% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 212 residents whose mean number of pounds of trash generated per person per week was 37.9 pounds and the standard deviation was 7.7 pounds. Round answers to 3 decimal places where possible. b. With 90% confidence the population mean number of pounds per person per week is between _______ and  ________ pounds. c. If many groups of 212 randomly selected members are studied, then a different confidence interval would be produced from each group. About __________ percent of these confidence intervals will contain the true population mean number of pounds of trash generated per person per week and about ____________ percent will not contain the true population mean number of pounds of trash generated per person per week.

How Much TV Do College Students Watch? In the dataset StudentSurvey, 361 students recorded the number of hours of television they watched per week. The average is I = 6.504 hours with a standard deviation of 5.584. Find a 95% confidence interval for u. Click here for the dataset associated with this question. Round your answers to three decimal places. The 95% confidence interval is to

Q1 1. The following spinner was spun 38 times. What is the probability of spinning A 16 times? Insert Image

A survey of 73 randomly selected homeowners finds that they spend a mean of $74 per month on home maintenance. Construct a 95% confidence interval for the mean amount of money spent per month on home maintenance by all homeowners. Assume that the population standard deviation is $16 per month. Round to the nearest cent.

A researcher is interested in finding a 90% confidence interval for the mean number of times per day that college students text. The study included 149 students who averaged 34.2 texts per day. The standard deviation was 18.6 texts. Round to 3 decimals. b. With 90% confidence the population mean number of texts per day is between _______ and ________ texts a day.

A random sample of 64 shoppers showed that they spend an average of $27.31 per visit at the Sunday Mornings Bookstore. The standard deviation of the population is $2.14. Find the 90% confidence interval of the true mean. Please include all work showing how you found your answer.