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urgent please QUESTION 17 Thirty-six randomly selected students took a Statistics test. If the sample mean...
A sample of 36 randomly selected students has a mean test score of 83.4 with a standard deviation of 8.92. Assume the population has a normal distribution. Find the margin of error, and then find the 95% confidence interval for the population mean.
6 Parameter Estimation 11. Thirty-five randomly selected students took the calculus final. If the sample mean was 82 and standard deviation was 4.6construct score of all students Provide estimates and circle one of the multiple choice answers. (6 points) a 99% confidence interval for the mean ,
arameter Estimation .C 11. Thirty-five randomly selected students took the calculus final. If the sample mean was 82 and standard deviation was 4.6, construct a 99% confidence interval for the mean score of all students. 35 Provide estimates and circle one of the multiple choice answers. (6 points) 34.
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sample of thirty- six students is taken from the entire population of 500 students. The mean test score for the sample is three hundred eighty. Find (a) 95% confidence interval for the unknown population mean test score. (b) 95% confidence interval for the unknown population mean test score if...
The principal randomly selected six students to take an aptitude test. Their scores were 79 88 83 80 72 78 Assume that the population is normally distributed. a) Check assumptions and determine an appropriate interval procedure. b) Find a 90% confidence interval for the mean score for all students. (Do not use any functions in TI=>STAT=>TESTS to show your work.) c) Interpret the confidence interval.
= Question Help For a random sample of 400 students, the mean cost for textbooks during the first semester of college was found to be $374.75, and the sample standard deviation was $30.81. Assuming that the population is normally distributed, find the margin of error of a 95% confidence interval for the population mean The margin of error for a 98% confidence interval is (Round to two decimal places as needed.) I
In a random sample of six mobile devices, the mean repair cost was $80.00 and the standard deviation was $12.00. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 95% confidence interval for the population mean. Interpret the results. The 95% confidence interval for the population mean mu is
14. Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 61.8 seconds. Assuming that σ=9.2 seconds, construct and interpret a 95% confidence interval estimate of the population mean of all students. What is the 95% confidence interval for the population mean μ? ____<μ<____ (Type integers or decimals rounded to one decimal place as needed.) 15. Salaries of 43 college graduates who...
17 randomly selected cars are driven for a tank and is found that the sample mean fuel consumption is 9.4 l/100k with a sample standard deviation of s = .437. suppose the manufactuer wishes to construct a confidence interval for mu the true mean fuel consumption for the model under these consitions what is the margin of error of a 95% confidence interval for mu what is the margin of error of a 90% confidence interval for mu
#17 please When a class of 23 students took the SAT, they had a mean score of 1445 with a standard deviation of 178. Construct a 99% confidence interval for the mean SAT score of all students (w). O (1368, 1522) O (1381, 1509) (1352, 1538) O (1340, 1550) QUESTION 17 What is the margin of error of the confidence interval constructed in exercise 167