QUESTION 28A car insurance company wanted information about the age of its customers. A researcher computed 90%, 95%, 97%, and99% confidence intervals for the population mean age of the customers. Which of the following intervals is the the 95%confidence interval for the population mean age?(36.30, 39.70)(36.70, 39.30)(36.56, 39.44)(36.91, 39.09)

Given that car insurance company wanted information about the age of its customers. A researcher…

Answered: QUESTION 28 A car insurance company…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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let the variable T stand for a student t-distributed variable. find the following a. in a sample of 20 students, the t-value to use to determine a 95% confidence interval for a mean b. in a sample of 30 students, the t-value to use to determine a 98% confidence interval for a mean
Out of 600 people sampled, 534 had kids. Based on this, construct a 95% confidence interval for the true population proportion of people with kids.Give your answers as decimals, to three places ___________< p < ______________
Question 3 . There is no difference(s) between an interval estimate and a confidence interval estimate. If true , explain. If false, explain.
Which type of confidence interval should you use in this situation? An economics professor randomly selected 100 millionaires in the United States. The average age of these millionaires was 54.8 years with a standard deviation of 7.9 years. What is the 95% confidence interval for the mean age of all United States millionaires? Question 5 options: 1) a confidence interval for the mean using a table value from the standard normal distribution. 2) a confidence interval for the mean using a table value from the t distribution. 3) a confidence interval for a proportion using a table value from the standard normal distribution. 4) a confidence interval for proportion using a table value from the t distribution. 5) none of the above.
Which type of confidence interval should you use in this situation? A sample of 6 adult elephants had an average weight of 12,200 pounds, with a sample standard deviation of 200 pounds. Find the 95% confidence interval of the true mean. Question 4 options: 1) a confidence interval for the mean using a table value from the standard normal distribution. 2) a confidence interval for the mean using a table value from the t distribution. 3) a confidence interval for a proportion using a table value from the standard normal distribution. 4) a confidence interval for proportion using a table value from the t distribution. 5) none of the above.
Out of 600 people sampled, 30 had children under the age of 18. Based on this, construct a 99% confidence interval for the true population proportion of people with children under the age of 18.Give your answers as decimals, to three places.____________ < p < ____________
A 99% confidence interval for the mean population height of male college freshman is calculated from a random sample of 50, and the confidence interval is (64,74) inches. Select all answers that apply. 2 For the instructor, this was question 28. Choose all that apply. Interpretation: 99% of the time the population mean lies between 64 inches to 74 inches Interpretation: 99% of the confidence intervals will contain the population mean. The population mean is random. The confidence interval is random. A 90% confidence interval will be shorter in length. A 90% confidence interval will be longer in length.
Find the margin of error, using a 95% confidence level, for estimating the percentage of all young people who earned a high school diploma. ____?
FF 3 1.A sample of eight adults was taken, and these adults were asked about the time they spend per week on sport activities. Their responses (in hours) are as follows: 45; 12; 31; 16; 28; 14; 18; 26 Make a 95 % confidence interval for the mean of time spent per week by all adults on sport activities.
You sample 36 students to find out how many hours they spent online last week. Your sample mean is 54. The population standard deviation, sigma, is 8.2. Your client now wants the 90% confidence interval for this sample mean. It is: 40.1 to 67.9 51.8 to 56.2 40.5 to 67.5 51.0 to 56.0
QUESTION 22 A car insurance company wanted information about the age of its customers. A researcher computed 90%, 95%, 97%, and 99% confidence intervals for the population mean age of the customers. Which of the following intervals is the the 97% confidence interval for the population mean age? (36.30, 39.70) O (36.70, 39.30) (36.56, 39.44) (36.91, 39.09)
Question 8: After calculating a 98% confidence interval for the difference in populations means of the weights of men and women in a certain country, the result was [4, 14]. What was the difference in sample means for these two groups? Answer:

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